PauliusC24 (Talk | contribs) m |
|||
(161 intermediate revisions by 7 users not shown) | |||
Line 33: | Line 33: | ||
<div class="clickable"> | <div class="clickable"> | ||
<div class="header-img hide-on-large-only "> | <div class="header-img hide-on-large-only "> | ||
− | |||
<img src="https://static.igem.org/mediawiki/2018/d/df/T--NTNU_Trondheim--labjournalmobile.png"> | <img src="https://static.igem.org/mediawiki/2018/d/df/T--NTNU_Trondheim--labjournalmobile.png"> | ||
+ | <div class="centered-mobile floating hide-on-large-only"> | ||
<i class="fas fa-angle-down fa-2x"></i> | <i class="fas fa-angle-down fa-2x"></i> | ||
</div> | </div> | ||
Line 44: | Line 44: | ||
<div class="headertext" style="padding-left: 50px; padding-right: 50px"> | <div class="headertext" style="padding-left: 50px; padding-right: 50px"> | ||
− | <p | + | <p style="text-align: center">In our lab journal we have thoroughly documented what we have done in the laboratory, what our goals each session has been, how we have worked and results from each session. If you want a closer look on our methods/receipies, take a look at our protocol.</p> |
</div> | </div> | ||
Line 65: | Line 65: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p style="font-size:120%;"> | + | <p style="font-size:120%;">Week 25</p></div> |
<div class="collapsible-body"><span> | <div class="collapsible-body"><span> | ||
Line 95: | Line 95: | ||
<b>Incubation of bacteria </b> | <b>Incubation of bacteria </b> | ||
<br> | <br> | ||
− | Two Escherichia coli (E. coli) samples which carry pgRNA and pdCas9 plasmids respectively, were ordered from Addgene. E.coli carrying the pgRNA plasmid were plated on agar plates with AMP, while E.coli carrying the pdCas9 plasmid were plated on agar plates with CM. Incubation for | + | Two Escherichia coli (E. coli) samples which carry pgRNA and pdCas9 plasmids respectively, were ordered from Addgene. E.coli carrying the pgRNA plasmid were plated on agar plates with AMP, while E.coli carrying the pdCas9 plasmid were plated on agar plates with CM. Incubation for 24 h at 37℃. |
<br> | <br> | ||
<br> | <br> | ||
Line 120: | Line 120: | ||
<br> | <br> | ||
<b>Procedure</b> <br> | <b>Procedure</b> <br> | ||
− | One colony of pgRNA- and pdCas9- bacteria were picked and inoculated in LB-media ( | + | One colony of pgRNA- and pdCas9- bacteria were picked and inoculated in LB-media (25 mL) with 25 µL of the associated antibiotic (AMP or CM). The cell cultures were incubated at 37℃ in a shaking incubator at 204 rpm. <br> |
</span></div> | </span></div> | ||
</li> | </li> | ||
Line 228: | Line 228: | ||
<br> | <br> | ||
<br> | <br> | ||
− | <u>Calibration 1:</u> | + | <u>Calibration 1:</u> OD 600 reference point – LUDOX protocol |
<br> | <br> | ||
− | A conversion factor to transform absorbance data from plate reader into OD600 was obtained in spectrometer by measuring four replicates of LUDOX CL-X and | + | A conversion factor to transform absorbance data from plate reader into OD600 was obtained in spectrometer by measuring four replicates of LUDOX CL-X and ddH<sub>2</sub>O. The data were imported into Excel sheet. |
<br> | <br> | ||
<br> | <br> | ||
<u>Calibration 2:</u> Particle standard curve – Microsphere protocol | <u>Calibration 2:</u> Particle standard curve – Microsphere protocol | ||
<br> | <br> | ||
− | The solution of silica beads provided in the kit from iGEM HQ, was vortexed before dilution with water ( | + | The solution of silica beads provided in the kit from iGEM HQ, was vortexed before dilution with water (96 μL Silica beads in 904 μL dd H<sub>2</sub>O). A serial dilution of microspheres was obtained by adding 100 μL dd H<sub>2</sub>O into 4x11 wells (E2, F2, G2, H2…E12, F12, G12, H12) on a 96 well plate. Microsphere stock solution (200 μL) was pipetted into E1 and 100 μL of the solution was transferred to E2 and mixed well before transferring 100 μL to E3. The procedure repeated until 100 μL solution was pipetted into E11, and 100 μL was transferred to liquid waste. The dilution series was repeated for row F, G and H. The absorbance of the samples was measured by a plate reader with shaker at 24℃. The data were exported to Excel sheet. |
− | + | ||
− | + | ||
− | + | ||
− | + | ||
− | + | ||
</span></div> | </span></div> | ||
Line 256: | Line 252: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p>Isolation of pgRNA and pdCas9 from compentent cells ( | + | <p>Isolation of pgRNA and pdCas9 from compentent cells (DH5α) and preparation of stock solution for calibration 3 for InterLab study</p></div> |
<div class="collapsible-body"><span> | <div class="collapsible-body"><span> | ||
<b>Goal:</b> | <b>Goal:</b> | ||
Line 269: | Line 265: | ||
<br> | <br> | ||
− | Each cell cultures (successful transformed competent cells from day 5 – 26.06.2018) (2. | + | Each cell cultures (successful transformed competent cells from day 5 – 26.06.2018) (2.5 mL) were transferred into fresh LB-medium (22.5 mL) with CM (22.5 μL). The new cultures were incubated for about 2 hours at 37℃ with shaking . |
<br> | <br> | ||
<br> | <br> | ||
Line 276: | Line 272: | ||
<br> | <br> | ||
− | The cell density of the new cultures was measured at | + | The cell density of the new cultures was measured at OD 600, after calibration with water (blank sample). |
<br> | <br> | ||
<br> | <br> | ||
Line 291: | Line 287: | ||
<br> | <br> | ||
− | The plasmids from each culture ( | + | The plasmids from each culture (5 μL) were digested by mixing with 10xbuffer (2 μL), distilled water (12.5 μL) and restriction enzyme BspHI (0.5 μL). The solution was centrifuged down before the samples were incubated over night at 37℃. |
<br> | <br> | ||
<br> | <br> | ||
− | + | ||
</span></div> | </span></div> | ||
</li> | </li> | ||
Line 327: | Line 323: | ||
<br> | <br> | ||
− | The cell cultures made from 27. June were stored in a glycerol stock (500 | + | The cell cultures made from 27. June were stored in a glycerol stock (500 µL cell culture and 500 µL 50% glycerol) in the freezer at -80℃. |
<br> | <br> | ||
<b>Results:</b> | <b>Results:</b> | ||
Line 335: | Line 331: | ||
<u>Plasmid verification:</u> | <u>Plasmid verification:</u> | ||
<br> | <br> | ||
− | L, pR1, pR2, pC1 and pC2 are the DNA-fragments from ladder solution, the two samples of pgRNA and pdCas9, respectively. From <b>Figure 1</b> the two fragments with 1. | + | L, pR1, pR2, pC1 and pC2 are the DNA-fragments from ladder solution, the two samples of pgRNA and pdCas9, respectively. From <b>Figure 1</b> the two fragments with 1.5 kb and 1.0 kb were found from the fragments of pgRNA after digestion by BspHI. The fragment with 100 bp from the digested pgRNA is not visible on the gel, probably due to masking of the dye colour at the bottom of the gel. Two bands from the digested pdCas9 with 2.7 kb and 4 kb were also detected. By comparing the results og gel elecrophoresis obtained from today's experiment with the results from day 3 (22. June. 2018), one can clearly see that the bands with the expected length from successful transformed competent cells, are much clearer. Hence, this also indicate the samples from the successful transformed DH5α cells are purer, which is also true by comparing the results from Nanodrop (see day 6 - 27. June. 2018, and day 3 - 22. June. 2018). |
</span></div> | </span></div> | ||
</li> | </li> | ||
Line 401: | Line 397: | ||
<br> | <br> | ||
− | Figure 1 shows the florescence standard curve in the concentration interval [0, 2. | + | Figure 1 shows the florescence standard curve in the concentration interval [0, 2.5 μM], with a R<sup>2</sup> value of 0,9956. The model of the fluorescence standard curve is: |
</span></div> | </span></div> | ||
</li> | </li> | ||
Line 460: | Line 456: | ||
<u>Separation of linear DNA from circular DNA:</u> | <u>Separation of linear DNA from circular DNA:</u> | ||
<br> | <br> | ||
− | The leaner DNA obtained from PCR (from day 8 – 29. June. 2018), was separated from the circular DNA (original plasmids) after running the sample ( | + | The leaner DNA obtained from PCR (from day 8 – 29. June. 2018), was separated from the circular DNA (original plasmids) after running the sample (25 μL) mixed with loading dye (5 μl) on gel electrophoresis (gelGreen) simultaneously with a ladder (1 μL gene ruler + 1 μL loading dye + 4 μL dH<sub>2</sub>O) for 50 min at 90 V. The sample and the ladder were prepared by the gel electrophoresis protocol. |
<br> | <br> | ||
Line 476: | Line 472: | ||
<u>Transformation of PCR product to competent cells:</u> | <u>Transformation of PCR product to competent cells:</u> | ||
− | The PCR product ( | + | The PCR product (5 μL) was transformed to competent cells after following the transformation protocol. |
<br> | <br> | ||
<u>InterLab – transformation of plasmids to competent cells:</u> | <u>InterLab – transformation of plasmids to competent cells:</u> | ||
Line 483: | Line 479: | ||
<br> | <br> | ||
<ol> | <ol> | ||
− | <li>Thaw the competent cells on ice ( | + | <li>Thaw the competent cells on ice (10 min), and pre-chill the eppendorf tubes.</li> |
− | <li>Resuspend the DNA in the wells (provided by iGEM HQ) with | + | <li>Resuspend the DNA in the wells (provided by iGEM HQ) with dH<sub>2</sub>O (10 μL).</li> |
− | <li>Add competent cells ( | + | <li>Add competent cells (50 μL) to the eppendorf tubes.</li> |
− | <li>Add resuspended DNA ( | + | <li>Add resuspended DNA (1 μL) to the Eppendorf tubes.</li> |
− | <li>Incubate on ice for | + | <li>Incubate on ice for 25 min</li> |
− | <li>Heat shock the cells for | + | <li>Heat shock the cells for 45 s at 42℃ in water bath</li> |
− | <li>Incubate on ice for | + | <li>Incubate on ice for 5 min.</li> |
<li>Add LB-medium (950μL) to the tubes</li> | <li>Add LB-medium (950μL) to the tubes</li> | ||
<li>Incubate for 1h at 37℃ with shacker</li> | <li>Incubate for 1h at 37℃ with shacker</li> | ||
− | <li>Pipette each sample ( | + | <li>Pipette each sample (100 μL) to agar plate with CM</li> |
− | <li>Centrifuge the samples for | + | <li>Centrifuge the samples for 3 min at 6800g, discard supernatant (800 μL) and resuspend the pellet with the remaining supernatant</li> |
− | <li>Pipette each sample ( | + | <li>Pipette each sample (100 μL) to agar plate with CM</li> |
<li>Incubate overnight at 37℃.</li> | <li>Incubate overnight at 37℃.</li> | ||
</ol> | </ol> | ||
Line 504: | Line 500: | ||
<br> | <br> | ||
− | <b>Figure 1</b> shows the image of the gel where the linearized DNA was separated from the circular DNA. The linearized DNA is approximately | + | <b>Figure 1</b> shows the image of the gel where the linearized DNA was separated from the circular DNA. The linearized DNA is approximately 2 kb. The linearized DNA fragment was then cut out from the gel and stored in eppendorf tube. |
<br> | <br> | ||
<br> | <br> | ||
Line 526: | Line 522: | ||
<tr> | <tr> | ||
<th>Concentration [ng/μL]</th> | <th>Concentration [ng/μL]</th> | ||
− | <th> | + | <th>260 nm/280 nm</th> |
− | <th> | + | <th>260 nm/230 nm</th> |
</tr> | </tr> | ||
<tr> | <tr> | ||
Line 585: | Line 581: | ||
<br> | <br> | ||
<br> | <br> | ||
− | Therefore, the remaining plasmids ( | + | Therefore, the remaining plasmids (6 μL) were transformed to the competent cells and plated on agar based on the same protocol from day 2. Jul. 2018. During the incubation at 37℃ with shaker, the incubation time was extended to 2 h. The cell cultures were centrifuged, and 700 μL supernatant was discarded, and the pellets were resuspended with the remaining supernatant. The cell cultures were then plated on agar plated with CM, and incubated overnight at 37℃. |
<br> | <br> | ||
<br> | <br> | ||
Line 594: | Line 590: | ||
<br> | <br> | ||
− | + | ||
<br></span></div> | <br></span></div> | ||
</li> | </li> | ||
Line 628: | Line 624: | ||
<br> | <br> | ||
<br> | <br> | ||
− | The plasmids (1. | + | The plasmids (1.5 μL) from the right wells were transformed to competent cells by following the transformation protocol from day – 02. July. 2018, after resuspension of the plasmids in the wells. |
<br> | <br> | ||
<br> | <br> | ||
<u>Cell density:</u> | <u>Cell density:</u> | ||
<br> | <br> | ||
− | The cell cultures with pgRNA(2) (probably with anti-luxS), inoculated from day 10 – 04. July. 2018, were diluted 10 times by following the same dilution procedure from day 6 – 27. June. 2018. The cells were incubated with shaker for 1h before measuring | + | The cell cultures with pgRNA(2) (probably with anti-luxS), inoculated from day 10 – 04. July. 2018, were diluted 10 times by following the same dilution procedure from day 6 – 27. June. 2018. The cells were incubated with shaker for 1h before measuring at OD 600. |
<br> | <br> | ||
<br> | <br> | ||
Line 643: | Line 639: | ||
<u>Restriction digest and gel elecrophoresis:</u> | <u>Restriction digest and gel elecrophoresis:</u> | ||
<br> | <br> | ||
− | Insertion of anti-luxS gene was verified after the protocol of restriction digest and gel electrophoresis (see the protocols from day 3 – 22. June. 2018). The restriction enzyme PstI was chosen, and the expected length of the plasmid fragments are | + | Insertion of anti-luxS gene was verified after the protocol of restriction digest and gel electrophoresis (see the protocols from day 3 – 22. June. 2018). The restriction enzyme PstI was chosen, and the expected length of the plasmid fragments are 490 bp and 2094 bp. |
<br> | <br> | ||
<br> | <br> | ||
Line 664: | Line 660: | ||
<br> | <br> | ||
<br> | <br> | ||
− | Table 1: Absorbance of the cell cultures with pgRNA(2) after | + | Table 1: Absorbance of the cell cultures with pgRNA(2) after 1 h incubation at 37℃ with shaker. |
<table style="width:35%"> | <table style="width:35%"> | ||
<tr> | <tr> | ||
<th>Culture</th> | <th>Culture</th> | ||
− | <th> | + | <th>OD 600</th> |
</tr> | </tr> | ||
<tr> | <tr> | ||
Line 692: | Line 688: | ||
<th></th> | <th></th> | ||
<th>Concentration (ng/μL)</th> | <th>Concentration (ng/μL)</th> | ||
− | <th> | + | <th>260 nm/280 nm</th> |
− | <th> | + | <th>260 nm/230 nm</th> |
</tr> | </tr> | ||
<tr> | <tr> | ||
Line 741: | Line 737: | ||
<br> | <br> | ||
− | Both pdCas9(2) and pgRNA(2) with anti-luxS (isolated from day 11 – 05. July. 2018) were simultaneously transformed into competent cells (DH5α). The amount of added pdCas9(2) ( | + | Both pdCas9(2) and pgRNA(2) with anti-luxS (isolated from day 11 – 05. July. 2018) were simultaneously transformed into competent cells (DH5α). The amount of added pdCas9(2) (5 μL) and pgRNA(2) with anti-luxS was 5 µL per/plasmid, and it was added to the same tube containing competent cells. The cells were plated on agar with both AMP and CM. A couple of steps were added at the end, and the purpose was to increase the cell concentration plated on agar, and probably increase the possibility of colony formation. The cell culture was therefore centrifuged for 3 minutes at 6800g, and the supernatant discarded. The pellet was then resuspended and cells were plated. |
<br> | <br> | ||
<br> | <br> | ||
<u>InterLab – Inoculation of colonies</u> | <u>InterLab – Inoculation of colonies</u> | ||
<br> | <br> | ||
− | A colony from each agar plate was inoculated in LB-medium ( | + | A colony from each agar plate was inoculated in LB-medium (5 mL) with CM (5 μL). The cell cultures were incubated overnight at 37℃ with shaker. |
<br> | <br> | ||
− | + | ||
− | + | ||
<br> | <br> | ||
Line 782: | Line 777: | ||
<br> | <br> | ||
<ol> | <ol> | ||
− | <li>A colony from each agar plates with AMP and CM (made from day 13 – 05. July 2018) was picked and inoculated in LB medium ( | + | <li>A colony from each agar plates with AMP and CM (made from day 13 – 05. July 2018) was picked and inoculated in LB medium (20 mL) with AMP (25 μL) and CM (25 μL). </li> |
<li>The cell cultures were incubated at 37℃ with shaker.</li> | <li>The cell cultures were incubated at 37℃ with shaker.</li> | ||
Line 797: | Line 792: | ||
<br> | <br> | ||
<br> | <br> | ||
− | + | ||
<br> | <br> | ||
</span></div> | </span></div> | ||
Line 826: | Line 821: | ||
<br> | <br> | ||
− | Each cell cultures, inoculated and incubated from day 13 – 07. July. 2018, were diluted (1mL) with LB medium with antibiotics until the | + | Each cell cultures, inoculated and incubated from day 13 – 07. July. 2018, were diluted (1mL) with LB medium with antibiotics until the OD 600 reached 1.9. |
<br> | <br> | ||
<br> | <br> | ||
Line 843: | Line 838: | ||
<br> | <br> | ||
<ul> | <ul> | ||
− | <li>7. | + | <li>7.1 μL Plasmids</li> |
− | <li>0. | + | <li>0.5 μL PstI</li> |
− | <li>0. | + | <li>0.5 μL BamHI-HF</li> |
− | <li> | + | <li>2 μL NEBuffer 1.1</li> |
− | <li>10. | + | <li>10.4 μL ddH2O</li> |
</ul> | </ul> | ||
− | The samples were incubated for 1. | + | The samples were incubated for 1.5 h at 37℃. |
<br> | <br> | ||
Line 880: | Line 875: | ||
<th>Sample</th> | <th>Sample</th> | ||
<th>Concentration [ng/μL]</th> | <th>Concentration [ng/μL]</th> | ||
− | <th> | + | <th>260 nm/280 nm</th> |
− | <th> | + | <th>260 nm/230 nm</th> |
</tr> | </tr> | ||
<tr> | <tr> | ||
Line 991: | Line 986: | ||
<p>InterLab Study: Revive bacteria glycerol stock</p></div> | <p>InterLab Study: Revive bacteria glycerol stock</p></div> | ||
<div class="collapsible-body"><span> | <div class="collapsible-body"><span> | ||
− | <p style="font-size:110%"><b> Goal </b> | + | <p style="font-size:110%"> |
+ | |||
+ | <p><b> Goal: </b></p> | ||
+ | |||
+ | <p>InterLab Study: Revive bacteria glycerol stock</p> | ||
− | <b>Procedure:</b> | + | <p><b>Procedure:</b></p> |
− | The frozen bacteria glycerol stock made from | + | <p>The frozen bacteria glycerol stock made from 6th of July were thawed on ice. Each culture were inoculated in LB medium with CM (5 mL), and incubated over night at 37°C.</p></span></div> |
</li> | </li> | ||
Line 1,133: | Line 1,132: | ||
<b>Goal:</b> | <b>Goal:</b> | ||
<br> | <br> | ||
− | Counting colonies on each agar plate, and calculate CFU/mL in starting samples with an OD<sub>600</sub> = 0 | + | Counting colonies on each agar plate, and calculate CFU/mL in starting samples with an OD<sub>600</sub> = 0.1. |
<br> | <br> | ||
<br> | <br> | ||
Line 1,153: | Line 1,152: | ||
<tr> | <tr> | ||
<td>Culture 1, dilution 1</td> | <td>Culture 1, dilution 1</td> | ||
− | <td>194 | + | <td>194.3</td> |
− | <td>117 | + | <td>117.3</td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>Culture 1, dilution 2</td> | <td>Culture 1, dilution 2</td> | ||
− | <td>7 | + | <td>7.7</td> |
− | <td>31 | + | <td>31.0</td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>Culture 1, dilution 3</td> | <td>Culture 1, dilution 3</td> | ||
− | <td>1 | + | <td>1.3</td> |
− | <td>2 | + | <td>2.3</td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>Culture 2, dilution 1</td> | <td>Culture 2, dilution 1</td> | ||
− | <td>104 | + | <td>104.0</td> |
− | <td>87 | + | <td>87.0</td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>Culture 2, dilution 2</td> | <td>Culture 2, dilution 2</td> | ||
− | <td>18 | + | <td>18.7</td> |
− | <td>5 | + | <td>5.7</td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>Culture 2, dilution 3 </td> | <td>Culture 2, dilution 3 </td> | ||
− | <td>1 | + | <td>1.3</td> |
− | <td>0 | + | <td>0.7</td> |
</tr> | </tr> | ||
</table> | </table> | ||
Line 1,236: | Line 1,235: | ||
<b> Procedure :</b> | <b> Procedure :</b> | ||
<br> | <br> | ||
− | Before doing the transformation the biobrick was resuspended with 10 | + | Before doing the transformation the biobrick was resuspended with 10 µL dH<sub>2</sub>O in the plate (position 23O, plate 7). The cells with and without the biobrick (negative control) were both incubated and plated after the transformation. The negative control was plated on LA-petri dishes while the transformed cells was plated on LA-petri dishes with CM. |
<br> | <br> | ||
<b> Results: </b> | <b> Results: </b> | ||
Line 1,357: | Line 1,356: | ||
<br> | <br> | ||
Made LA-petri dishes with CM. | Made LA-petri dishes with CM. | ||
− | Diluted cultures of the biobrick | + | Diluted cultures of the biobrick Bba_J04450 and negative control and incubated them at 37°C overnight. |
<br> | <br> | ||
<br> | <br> | ||
<u>Demonstration and training in fluorescence microscopy:</u> | <u>Demonstration and training in fluorescence microscopy:</u> | ||
<br> | <br> | ||
− | Astrid Bjørkøy showed us how to use the fluorescence microscope, and we tried it out by taking photos of cultures of the | + | Astrid Bjørkøy showed us how to use the fluorescence microscope, and we tried it out by taking photos of cultures of the Bba_J04450 biobrick. She also told us how to count cells by adjusting a photo's threshold and calculate based on image size. |
<br> | <br> | ||
<br> | <br> | ||
<b>Results:</b> | <b>Results:</b> | ||
<br> | <br> | ||
− | The biobrick | + | The biobrick Bba_J004450 was very bright. We used excitation 561 nm and emission ca 625-680 nm as the biobrick was too bright at emission 607 nm. Consider using another laser further away from excitation point (584 nm) for the real photos of the biobrick, and the improved biobrick. |
<br> | <br> | ||
Line 1,388: | Line 1,387: | ||
<b>Goal:</b> | <b>Goal:</b> | ||
<br> | <br> | ||
− | Measure the expression of the | + | Measure the expression of the Bba_J04450 biobrick in transformed dH5α cells. This is done by measuring fluorescence. |
<br> | <br> | ||
<br> | <br> | ||
Line 1,400: | Line 1,399: | ||
<br> | <br> | ||
<ul> | <ul> | ||
− | <li>Temperature: 37,0°C, varying from 36, | + | <li>Temperature: 37,0°C, varying from 36,5°C to 37,5°C</li> |
<li>Kinetic cycles: 750</li> | <li>Kinetic cycles: 750</li> | ||
<li>Gain: 40</li> | <li>Gain: 40</li> | ||
Line 1,457: | Line 1,456: | ||
<b>Goal:</b> | <b>Goal:</b> | ||
<br> | <br> | ||
− | Make supercompetent cells of the | + | Make supercompetent cells of the E.coli - TG1 strain |
<br> | <br> | ||
<br> | <br> | ||
Line 1,468: | Line 1,467: | ||
- Made Psi media, transformation buffer 1 and transformation buffer 2. | - Made Psi media, transformation buffer 1 and transformation buffer 2. | ||
<br> | <br> | ||
− | - Made an E.coli TG1 culture in a small flask with | + | - Made an E.coli TG1 culture in a small flask with 10 mL Psi- medium. Inoculated culture at the end of the day and left the flask for incubating while shaking and at 37°C overnight. |
<br> | <br> | ||
<br> | <br> | ||
− | + | ||
<br> | <br> | ||
</span></div> | </span></div> | ||
Line 1,489: | Line 1,488: | ||
<p>Make supercompetent cells of the TG1, day 2</p></div> | <p>Make supercompetent cells of the TG1, day 2</p></div> | ||
<div class="collapsible-body"><span> | <div class="collapsible-body"><span> | ||
− | < | + | |
− | < | + | <p><b>Goal:</b></p> |
− | This was done from an overnight culture of TG1-cells, see protocol. | + | <p>Make supercompetent cells of the TG1</p> |
− | <b>Results:</b> | + | |
− | < | + | <p><b>procedure:</b></p> |
− | There was no growth on the plates with CM and AMP after the transformation (25. July. 2018), so the conclusion was that the cells were not supercompetent. The protocol was then updated and optimized for another trial. | + | |
+ | <p>This was done from an overnight culture of TG1-cells, see protocol. </p> | ||
+ | |||
+ | <p><b>Results:</b></p> | ||
+ | |||
+ | <p>There was no growth on the plates with CM and AMP after the transformation (25. July. 2018), so the conclusion was that the cells were not supercompetent. The protocol was then updated and optimized for another trial. </p> | ||
</span></div> | </span></div> | ||
</li> | </li> | ||
Line 1,571: | Line 1,575: | ||
<p>Make supercompetent cells of TG1, second attempt</p></div> | <p>Make supercompetent cells of TG1, second attempt</p></div> | ||
<div class="collapsible-body"><span> | <div class="collapsible-body"><span> | ||
− | <b>Goal: </b> | + | <p><b>Goal:</b></p> |
− | < | + | |
− | + | <p>Make supercompetent cells of TG1 by following an improved protocol.</p> | |
− | < | + | |
+ | <p><b>Procedure:</b></p> | ||
+ | <p>See Protocols for details.</p> | ||
+ | |||
+ | <p><b>Results:</b></p> | ||
+ | <p>Transformation successful</p> | ||
</ul> | </ul> | ||
Line 1,582: | Line 1,591: | ||
<!------------------------------------------- END OF WEEK ---------------------------------------------> | <!------------------------------------------- END OF WEEK ---------------------------------------------> | ||
− | |||
− | |||
− | |||
<!------------------------------------------- WEEK ---------------------------------------------------> | <!------------------------------------------- WEEK ---------------------------------------------------> | ||
<li> | <li> | ||
Line 1,615: | Line 1,621: | ||
</div> | </div> | ||
</div> | </div> | ||
− | + | <p>Transformation of TG1-cells and flow cytometry test</p></div> | |
<div class="collapsible-body"><span> | <div class="collapsible-body"><span> | ||
− | <b>Goal: </b> | + | <p><b>Goal: </b></p> |
− | < | + | <p> |
− | 1. Transformation of TG1-cells with DNA that includes pdCas9 and pgRNA with antiluxS-gene. | + | 1. Transformation of TG1-cells with DNA that includes pdCas9 and pgRNA with antiluxS-gene.</p> |
− | 2. Learn and conduct a flow cytometry test of the E.Coli DH5a that contains the Bba_J04450-biobrick and a negative control. The goal was also to optimize a protocol for the biobrick measurements. | + | <p>2. Learn and conduct a flow cytometry test of the E.Coli DH5a that contains the Bba_J04450-biobrick and a negative control. The goal was also to optimize a protocol for the biobrick measurements.</p> |
− | + | ||
− | + | ||
− | + | ||
− | + | ||
− | pgRNA with antiluxS and pdCas9 has already been transformed into E.coli DH5α. The plasmids were isolated and extracted by the miniprep protocol, and the cells transformed and incubated. For the transformation, | + | <p><b>Procedure:</b></p> |
+ | |||
+ | |||
+ | <p>pgRNA with antiluxS and pdCas9 has already been transformed into E.coli DH5α. The plasmids were isolated and extracted by the miniprep protocol, and the cells transformed and incubated. For the transformation, 5 µL of the miniprepped plasmids were used instead of 2 µL.</p> | ||
<br> | <br> | ||
<br> | <br> | ||
− | + | <p><b>Results:</b></p> | |
− | < | + | <p> Noticeable bacterial growth was observed on all plates, with no apparent contamination.</p> |
− | <b>Results:</b> Noticeable bacterial growth was observed on all plates, with no apparent contamination. | + | |
</span></div> | </span></div> | ||
</li> | </li> | ||
+ | |||
<li> | <li> | ||
<div class="collapsible-header"> | <div class="collapsible-header"> | ||
Line 1,646: | Line 1,651: | ||
</div> | </div> | ||
</div> | </div> | ||
− | + | <p>TG1 colonypicking</p></div> | |
<div class="collapsible-body"><span> | <div class="collapsible-body"><span> | ||
<br> | <br> | ||
Line 1,658: | Line 1,663: | ||
<b>Procedure:</b> | <b>Procedure:</b> | ||
<br> | <br> | ||
− | Colonypicking into five beakers with | + | Colonypicking into five beakers with 25 mL LB, 25uL Amp and 25 µL CM. Incubation at 37°C, 225 RPM overnight. New LB-media was made. |
</span></div> | </span></div> | ||
− | + | ||
+ | </li> | ||
<li> | <li> | ||
<div class="collapsible-header"> | <div class="collapsible-header"> | ||
Line 1,667: | Line 1,673: | ||
<div class="date-display-cal"> | <div class="date-display-cal"> | ||
<div class="date-display-month"> | <div class="date-display-month"> | ||
− | + | Aug | |
+ | </div> | ||
<div class="date-display-day"> | <div class="date-display-day"> | ||
1 | 1 | ||
Line 1,673: | Line 1,680: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p>Miniprep, Nanodrop, Test digest</p></div> |
− | + | <div class="collapsible-body"><span> | |
− | < | + | <p>Miniprep, Nanodrop and Test digest was done.</p> |
− | + | ||
− | + | ||
− | + | ||
− | + | ||
− | + | ||
</span></div> | </span></div> | ||
− | |||
<li> | <li> | ||
<div class="collapsible-header"> | <div class="collapsible-header"> | ||
Line 1,688: | Line 1,689: | ||
<div class="date-display-cal"> | <div class="date-display-cal"> | ||
<div class="date-display-month"> | <div class="date-display-month"> | ||
− | + | Aug | |
</div> | </div> | ||
<div class="date-display-day"> | <div class="date-display-day"> | ||
Line 1,724: | Line 1,725: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p>Measure OD + change medium</p></div> |
<div class="collapsible-body"><span> | <div class="collapsible-body"><span> | ||
− | < | + | <p>OD600 was measured and medium changed. </p> |
− | + | ||
</ul> | </ul> | ||
− | + | <!-------------------------------------- END OF DAYS IN WEEK ----------------------------------------> | |
</li> | </li> | ||
<!------------------------------------------- END OF WEEK ---------------------------------------------> | <!------------------------------------------- END OF WEEK ---------------------------------------------> | ||
− | + | ||
+ | <!------------------------------------------- WEEK ---------------------------------------------------> | ||
<li> | <li> | ||
<div class="collapsible-header"> | <div class="collapsible-header"> | ||
Line 1,748: | Line 1,750: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p style="font-size:120%;"> | + | <p style="font-size:120%;">Week 32</p></div> |
<div class="collapsible-body"><span> | <div class="collapsible-body"><span> | ||
Line 1,758: | Line 1,760: | ||
<div class="date-display-cal"> | <div class="date-display-cal"> | ||
<div class="date-display-month"> | <div class="date-display-month"> | ||
− | + | Aug | |
</div> | </div> | ||
<div class="date-display-day"> | <div class="date-display-day"> | ||
Line 1,765: | Line 1,767: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p> E.Coli TG1 biofilm measurement</p></div> |
− | <div class="collapsible-body"><span> | + | <div class="collapsible-body"><span> |
+ | <p>The two E.Coli TG1 96-well plates made yesterday (06.08.2018) underwent the Crystal Violet Assay protocol (see Protocols), and the biofilm produced was measured by measuring absorbance at 590 nm with Tecan Infinite 200 Pro plate reader.</p></span></div> | ||
</li> | </li> | ||
− | + | ||
+ | <li> | ||
<div class="collapsible-header"> | <div class="collapsible-header"> | ||
<div class="date-display"> | <div class="date-display"> | ||
Line 1,780: | Line 1,784: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p>Incubate DH5α and TG1 in chosen media for biofilm measurements.</p></div> |
− | <div class="collapsible-body"><span> | + | <div class="collapsible-body"><span> |
+ | <b> Goal: </b> | ||
+ | <br> | ||
+ | <br> | ||
+ | - Incubate DH5α and TG1 (with pgRNA and pdCas) in selected media (LB and M63B1, pH 7.2, 0.4%/0.8% Glucose) | ||
+ | |||
+ | - Make Tetracycline stock solution (5.0 mg/ml) | ||
+ | <br> | ||
+ | <br> | ||
+ | <b> Procedure: </b> | ||
+ | <br> | ||
+ | <br> | ||
+ | Incubated the frozen DH5α-stocks in LB (with CM and AMP) for a few hours. Inoculated into the chosen media in eppendorf tubes. Incubated TG1 into the chosen media in eppendorf tubes overnight. | ||
+ | |||
+ | Made 5mg/mL Tetracyclin-solution (inducer). Note: light sensitive. | ||
+ | <br> | ||
+ | <br> | ||
+ | <u>Protocol:</u> | ||
+ | <br> | ||
+ | - Tetracyclin-HCl(powder): 54 mg | ||
+ | <br> | ||
+ | - Ethanol: 7 mL | ||
+ | <br> | ||
+ | - dH2O: 3 mL | ||
+ | <br> | ||
+ | After being incubated for some time tetracyclin solution was added to the eppendorf tubes do induce the transcription of Cas9, and the culture tubes were further incubated. | ||
+ | |||
+ | |||
+ | </span></div> | ||
</li> | </li> | ||
<li> | <li> | ||
Line 1,795: | Line 1,827: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p>Incubation of cell cultures for biofilm assay and preparation of M63B1 medium</p></div> |
− | <div class="collapsible-body"><span> | + | |
+ | <div class="collapsible-body"><span> | ||
+ | <b>Goal :</b> | ||
+ | <br> | ||
+ | <br> | ||
+ | 1. Incubate cell cultures on 96-well plates for biofilm assay | ||
+ | <br> | ||
+ | 2. Make M63B1 medium | ||
+ | <br> | ||
+ | <br> | ||
+ | <b>Procedure :</b> | ||
+ | <br> | ||
+ | <br> | ||
+ | <u>Preparation for biofilm assay:</u> | ||
+ | <br> | ||
+ | 1. Overnight cultures (with TET) was diluted until OD600 = 0.1 | ||
+ | <br> | ||
+ | 2. Each diluted culture (100μL) was added on 96-well plate and incubated for 4 h at 37℃ | ||
+ | <br> | ||
+ | 3. After 4 h incubation, the non-adhered cells were removed by washing the wells with physiological saline and the supernatant was discarded. | ||
+ | <br> | ||
+ | 4. New medium (100 μL) was added to each well and the plate was incubated for 24 h at 37℃. | ||
+ | <br> | ||
+ | Note! The media that were added to the wells right before 24 h incubation did not contain TET | ||
+ | <br> | ||
+ | <br> | ||
+ | <u>M63B1 medium:</u> | ||
+ | <br> | ||
+ | M63B1 medium was made after following the protocol from 26. July. 2018 | ||
+ | <br> | ||
+ | <br> | ||
+ | |||
+ | </span></div> | ||
</li> | </li> | ||
<li> | <li> | ||
Line 1,810: | Line 1,874: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p>Preparation of media with TET, and incubation of cell cultures on 96-well plate for biofilm assay |
− | <div class="collapsible-body"><span> | + | </p></div> |
+ | <div class="collapsible-body"><span> | ||
+ | <b>Goal :</b> | ||
+ | <br> | ||
+ | <br> | ||
+ | 1. Preparation of media with tetracycline (2 μM) | ||
+ | <br> | ||
+ | 2. Incubate cell cultures with and without tetracycline (TET) on a 96-well plate for the 24 h biofilm assay. | ||
+ | <br> | ||
+ | 3. Measure the absorbance of CV- assay with and without TET, made from yesterdays’ incubation. | ||
+ | <br> | ||
+ | 4. Prepare TG1 and dH5α cell cultures in growth medium (LB or M631B) with or without TET (2 μM). | ||
+ | <br> | ||
+ | <br> | ||
+ | <b>Procedure :</b> | ||
+ | <br> | ||
+ | <br> | ||
+ | <u>Preparation of media with TET (2 μM):</u> | ||
+ | <br> | ||
+ | 1. Tetracycline (TET) (50 μL, 0.5 mg/mL) was added to a 25mL LB medium with 0.4% glucose, AMP and CM. The same amount of tetracycline was added to LB medium with 0.8% glucose, AMP and CM | ||
+ | <br> | ||
+ | 2. For the final M63B1 medium (0.5 L) with MgSO4*7H2O, AMP and CM and 0.4% or 0.8% glucose, TET (1mL, 0.5 mg/mL) was added. | ||
+ | <br> | ||
+ | <br> | ||
+ | <u>Preparation of 96-wells plate for 24h biofilm assay:</u> | ||
+ | <br> | ||
+ | 1. Overnight cultures were diluted with or without TET (2 μM) containing media (LB or M63B1) until a target OD600 = 0.1. | ||
+ | <br> | ||
+ | 2. Each diluted culture (100 μL) were incubated on a 96-wells plate for 20 h at 37℃. | ||
+ | <br> | ||
+ | <br> | ||
+ | <u>Absorbance measurement of CV-assay:</u> | ||
+ | <br> | ||
+ | 1. The supernatant was discarded from a 24h incubation of cell cultures on a 96-wells plate (prepared from 08. August. 2018) and rinsed with PS (100μL). | ||
+ | <br> | ||
+ | 2. The biofilm was fixed by adding methanol (100 μL, 99%) and waited for 15min. The supernatant was discarded, and the plate was airdried. | ||
+ | <br> | ||
+ | 3. CV-solution (100 μL, 0.1%) was added to each well and coloured the biofilm for 20 min. The excess CV was washed away with dH<sub>2</sub>O | ||
+ | 4. Acetic acid (150 μL, 33%) was added to the each well. | ||
+ | <br> | ||
+ | 5. The absorbance was measured at Abs 590 nm | ||
+ | <br> | ||
+ | <br> | ||
+ | |||
+ | |||
+ | </span></div> | ||
</li> | </li> | ||
<li> | <li> | ||
Line 1,825: | Line 1,934: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p>Preparation of overnight cultures for biofilm assay, and storage of TG1 cells with pgRNA and pdCas9 |
− | <div class="collapsible-body"><span> | + | </p></div> |
+ | |||
+ | <div class="collapsible-body"><span> | ||
+ | |||
+ | <b>Goal :</b> | ||
+ | <br> | ||
+ | <br> | ||
+ | 1. Prepare overnight cultures in LB (0.4% or 0.8% glucose, with AMP and CM) or M63B1 (0.4% or 0.8% glucose, with AMP and CM) with or without TET. | ||
+ | <br> | ||
+ | 2. Wash the 96-well plate (after 20 h adhesion - prepared from 09.08.2018) with physiological saline, add new media and incubate the plate. | ||
+ | <br> | ||
+ | 3. Make bacteria glycerol stocks of TG1 cells with pgRNA and pdCas9. | ||
+ | <br> | ||
+ | <br> | ||
+ | <b>Procedure :</b> | ||
+ | <br> | ||
+ | <br> | ||
+ | |||
+ | <u>Preparation of overnight culture:</u> | ||
+ | <br> | ||
+ | <br> | ||
+ | TG1 and dH5α were incubated in eppendorf tubes with different media (LB or M63B1 with glucose (0.4% or 0.8%), AMP and CM) with or without TET (2 μM) for overnight at 37℃ with shaking. | ||
+ | <br> | ||
+ | <br> | ||
+ | <u>Preparation for biofilm assay:</u> | ||
+ | <br> | ||
+ | <br> | ||
+ | 1. After 20 h adhesion (plate prepared from 09. August. 2018), the non-adhered cells were removed by washing the wells with physiological saline (PS) and the supernatant was discarded. | ||
+ | <br> | ||
+ | 2. New medium (100 μL) was added to each well and the plate was incubated for 24 h at 37℃. | ||
+ | <br> | ||
+ | <br> | ||
+ | <u>Bacteria glycerol stock preparation:</u> | ||
+ | <br> | ||
+ | <br> | ||
+ | TG1 cells with pgRNA and pdCas9 (500 μL) was stored with glycerol (500 μL, 50%) at -80℃. | ||
+ | <br> | ||
+ | <br> | ||
+ | |||
+ | </span></div> | ||
</li> | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Aug | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 11 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Preparation of overnight cultures for biofilm assay | ||
+ | |||
+ | </p></div> | ||
+ | |||
+ | <div class="collapsible-body"><span> | ||
+ | <b>Goal :</b> | ||
+ | <br> | ||
+ | <br> | ||
+ | Prepare 96-well for cell adhesion and CV-assay | ||
+ | <br> | ||
+ | <br> | ||
+ | <b>Procedure :</b> | ||
+ | <br> | ||
+ | <br> | ||
+ | The OD of some of the overnight cultures was not optimal for continuing the procedure of CV assay. New cell cultures were made. | ||
+ | <br> | ||
+ | <br> | ||
+ | 96-well plates for 24 h, 48 h and 72 h incubation were made. However, since the cell cultures could not be diluted to OD = 0.1, the results of the CV assay will not be comparable. | ||
+ | |||
+ | </span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Aug | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 12 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Incubation of cell cultures for biofilm assay | ||
+ | |||
+ | </p></div> | ||
+ | |||
+ | <div class="collapsible-body"><span> | ||
+ | <b>Goal :</b> | ||
+ | <br> | ||
+ | <br> | ||
+ | Preparation for cell adhesion on 96-well plates for 24 h, 48 h and 72 h incubation. | ||
+ | <br> | ||
+ | <br> | ||
+ | <b>Procedure :</b> | ||
+ | <br> | ||
+ | <br> | ||
+ | 1. The overnight cultures were resuspended, before dilution until a target OD = 0.1. | ||
+ | <br> | ||
+ | 2. The diluted cell cultures were resuspended and added on 96-well plates and incubated for 4 h at 37℃. | ||
+ | <br> | ||
+ | 3. After 4 h incubation, the wells were washed with physiological saline (100 μL) and the supernatant was discarded. | ||
+ | <br> | ||
+ | 4. New media (100 μL) were added to the plates, and the plates were incubated at 37℃. | ||
+ | <br> | ||
+ | <br> | ||
+ | <b>Results :</b> | ||
+ | </span></div> | ||
</ul> | </ul> | ||
Line 1,835: | Line 2,053: | ||
<!------------------------------------------- END OF WEEK ---------------------------------------------> | <!------------------------------------------- END OF WEEK ---------------------------------------------> | ||
+ | |||
+ | |||
+ | |||
<!------------------------------------------- WEEK ---------------------------------------------------> | <!------------------------------------------- WEEK ---------------------------------------------------> | ||
<li> | <li> | ||
Line 1,848: | Line 2,069: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p style="font-size:120%;"> | + | <p style="font-size:120%;">Week 33</p></div> |
<div class="collapsible-body"><span> | <div class="collapsible-body"><span> | ||
Line 1,865: | Line 2,086: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p>Biofilm measurements after 24hrs</p></div> |
− | <div class="collapsible-body"><span> | + | <div class="collapsible-body"><span> |
+ | |||
+ | <b>Procedure:</b> | ||
+ | |||
+ | Crystal violet assay | ||
+ | <br> | ||
+ | <br> | ||
+ | Changed medium in the plate for 48 and 72 hrs. | ||
+ | <br> | ||
+ | <br> | ||
+ | |||
+ | <b>Results:</b> | ||
+ | <br> | ||
+ | |||
+ | Results did not show any clear trend. Excel sheet attached. | ||
+ | <br> | ||
+ | |||
+ | Wells with only medium, not cells, showed too high absorbance measurements, probably because of contamination of the mediums. Decided to autoclave all the mediums again. Will take measurements at 48 hrs, but not at 72 hrs. | ||
+ | </span></div> | ||
</li> | </li> | ||
<li> | <li> | ||
Line 1,880: | Line 2,119: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p>Biofilm measurement after 48 hrs</p></div> |
− | <div class="collapsible-body"><span> | + | <div class="collapsible-body"><span> |
+ | <b>Goal: </b> | ||
+ | </b> | ||
+ | <br> | ||
+ | <ol> | ||
+ | <li>Measure biofilm after 48 hrs.</li> | ||
+ | |||
+ | <li>Prepare RRVT-Biobrick and biobrick backbone</li> | ||
+ | |||
+ | <li>Ligate and transform RRvT- biobrick and biobrick backbone into DH5alpha cells.</li> | ||
+ | </ol> | ||
+ | |||
+ | |||
+ | <b>Procedure:</b> | ||
+ | <br> | ||
+ | |||
+ | 1. Performed the Crystal Violet Assay procedure for the plate designated for 48hrs and for the plate that initially was designated for 72 hrs measurement. | ||
+ | |||
+ | |||
+ | |||
+ | </span></div> | ||
</li> | </li> | ||
<li> | <li> | ||
Line 1,895: | Line 2,154: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p>Biobrick ligation and transformation</p></div> |
− | <div class="collapsible-body"><span> | + | <div class="collapsible-body"><span> |
− | + | <b>Goal: </b> | |
− | + | <p>Biobrick ligation and transformation</p> | |
+ | </b> | ||
+ | <br> | ||
+ | <ol> | ||
+ | <li> Ligate plasmid backbone and RRvT-plasmid and transform into cells. </li> | ||
+ | <li> Due to the lack of colonies from yesterdays transformation the ligation of plasmid backbone and RRvT-plasmid and transformation into E.Coli Dh5α cells was redone. </li> | ||
+ | </ol> | ||
+ | <b>Procedure:</b> | ||
+ | <br> | ||
+ | <ol> | ||
+ | <ul>Preparations of plasmid backbone and RRvT-biobrick: | ||
+ | <br> | ||
+ | |||
+ | <p> Made enzyme master mix for plasmid backbone by adding 5μL NEB buffer 2, 0.5 μL EcoRI-HF, 0.5 μL PstI, 0.5 μL BSA and 18.5 μL dH<sub>2</sub>O to an Eppendorf tube. </p> | ||
+ | <p> Made enzyme master mix for RRvT-biobrick by adding 5μL NEB buffer 2, 0.5μL EcoRI-HF, 0.5 μL PstI and 19 μL dH<sub>2</sub>O to an Eppendorf tube. Incubated mix for 20 min at 50℃. <p> | ||
+ | <p> Digested Plasmid backbone by adding 4 μL linearized backbone (25 ng/μL for 100 ng) and 4 μL of enzyme master mix for plasmid backbone. </p> | ||
+ | <p> Digested RRvT-biobrick by adding 4 μL of the biobrick and 4 μL of the enzyme master mix for RRvT-biobrick. | ||
+ | Digested both reactions at 37℃ for 90 min and did heat kill at 80℃ for 20 min. </p> </ul> | ||
+ | <br> | ||
+ | <ul>Ligation: | ||
+ | <br> | ||
+ | <p> Added 2 μL of digested plasmid backbone. </p> | ||
+ | <p> Added 2 μL of digested RRvT-biobrick. </p> | ||
+ | <p> Added 1 μL T4 DNA ligase buffer. </p> | ||
+ | <p> Added 0.5 μL of T4 DNA ligase. </p> | ||
+ | <p> Added water to 10 μL. </p> | ||
+ | <p> Ligated at 16℃ for30min. Did heat kill at 80℃ for 20 min. </p> | ||
+ | <br> | ||
+ | <p> Transformed <i> E.Coli </i> Dh5α cells with 1-2 μL of product following the protocol for transformation. </p> | ||
+ | <p> Inoculated .. plates and let them incubate at 37℃ to the next day.</p><ul> | ||
+ | </ol> | ||
+ | <li> | ||
+ | <!--- Change ---> | ||
<div class="collapsible-header"> | <div class="collapsible-header"> | ||
<div class="date-display"> | <div class="date-display"> | ||
Line 1,910: | Line 2,201: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p>Preparation for biobrick (RRvT) measurement and biofilm assay </p></div> |
− | <div class="collapsible-body"><span> | + | <div class="collapsible-body"><span> |
− | + | <b> Goal: </b> | |
+ | </b> | ||
+ | <br> | ||
+ | <ol> | ||
+ | <li> Inoculate successful transformed cells into LB medium with CM. </li> | ||
+ | <li> Revive TG1 and DH5α cells in LB medium with AMP, CM and 0% glucose. </li> | ||
+ | </ol> | ||
+ | <b> Procedure: </b> | ||
+ | <p> Preparation for biobrick (RRvT) measurement: </p> | ||
+ | <p> Successful transformed cell colonies from yesterday's incubation were inoculated into LB - medium with CM and incubated at 37°C with shaking. </p> | ||
+ | <p> Preparation for cell cultures for biofilm assay: </p> | ||
+ | <p> TG1 and DH5α cells with pgRNA and pdCas9 were revived in LB medium with AMP, CM and 0% glucose. The cell cultures were incubated at 37°C with shaking. </p> | ||
+ | |||
+ | <!--- Change ---> | ||
+ | </span></div> | ||
+ | |||
+ | </li> | ||
<li> | <li> | ||
− | + | <!--- Change ---> | |
+ | |||
+ | <div class="collapsible-header"> | ||
<div class="date-display"> | <div class="date-display"> | ||
<div class="date-display-cal"> | <div class="date-display-cal"> | ||
Line 1,925: | Line 2,234: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p>Preparation for biofilm assay</p></div> |
− | + | <div class="collapsible-body"><span> | |
− | + | ||
+ | |||
+ | |||
+ | |||
+ | |||
+ | <b> Goal: </b> | ||
+ | <br> | ||
+ | <ul> | ||
+ | <li> Dilute the overnight cultures for biofilm assay. </li> | ||
+ | <li> Do Crystal Violet assay after 3 h, 5 h and 8 h of incubation of a 96-well plate. </li> | ||
+ | </ul> | ||
+ | <br> | ||
+ | <b> Procedure: </b> | ||
+ | <p> The media for biofilm assay were made by adding the following ingredients: </p> | ||
+ | <ul> | ||
+ | <li> LB 0.4% glucose, TET: 10 mL LB, 10µL AMP, 10µL CM, 0.2 mL 20% Glucose, 19.7µL 0.5mg/mL TET </li> | ||
+ | <li> LB 0.8% glucose, TET: 10 mL LB, 10µL AMP, 10µL CM, 0.4 mL 20% Glucose, 20µL 0.5mg/mL TET </li> | ||
+ | <li> LB 0.4% glucose: 10 mL LB, 10µL AMP, 10µL CM, 0.2 mL 20% Glucose </li> | ||
+ | <li> LB 0.8% glucose: 10 mL LB, 10µL AMP, 10µL CM, 0.4 mL 20% Glucose </li> | ||
+ | <li> M63B1 0.4% glucose, TET: 10 mL M63B1, 10µL AMP, 10µL CM, 10 µL 1M MgSO<sub>4</sub>*7H<sub>2</sub>O, 0.2 mL 20% Glucose, 19.7 µL TET </li> | ||
+ | <li> M63B1 0.8% glucose, TET: 10 mL M63B1, 10µL AMP, 10µL CM, 10 µL 1M MgSO<sub>4</sub>*7H<sub>2</sub>O, 0.4 mL 20% Glucose, 20 µL TET </li> | ||
+ | <li> M63B1 0.4% glucose: 10 mL M63B1, 10µL AMP, 10µL CM, 10 µL 1M MgSO<sub>4</sub>*7H<sub>2</sub>O, 0.2 mL 20% Glucose </li> | ||
+ | <li> M63B1 0.8% glucose: 10 mL M63B1, 10µL AMP, 10µL CM, 10 µL 1M MgSO<sub>4</sub>*7H<sub>2</sub>O, 0.4 mL 20% Glucose </li> | ||
</ul> | </ul> | ||
+ | <p> Biofilm assay: </p> | ||
+ | <ul> | ||
+ | <li> Pipette 3-4 mL overnight cultures to sterile tubes (total 16 tubes). </li> | ||
+ | <li> Centrifuge the cultures for 10 min at 2000 rpm at 9°C. </li> | ||
+ | <li> Remove the supernatant. </li> | ||
+ | <li> Add 3-4 mL media (LB/ M63B1, with 0.4%/ 0.8% glucose, with/ without TET) to 2 tubes each. </li> | ||
+ | <li> Resuspend/ vortex the cultures, and measure OD 600. </li> | ||
+ | <li> Dilute the cultures until target OD 600 = 0.1 and store the cells on ice until they are added to the wells. </li> | ||
+ | <li> Resuspend/ vortex the cultures, add 100 µL culture to each well on the plate. </li> | ||
+ | <li> Seal the top of the plate with parafilm, and incubate the plate at 37°C. </li> | ||
+ | <li> Do CV assay after 3 h, 5 h, 8 h, 24 h and 48 h incubation. </span></div> | ||
+ | </ul> | ||
+ | |||
+ | </li> | ||
+ | |||
<!-------------------------------------- END OF DAYS IN WEEK ----------------------------------------> | <!-------------------------------------- END OF DAYS IN WEEK ----------------------------------------> | ||
Line 1,948: | Line 2,293: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p style="font-size:120%;"> | + | <p style="font-size:120%;">Week 34</p></div> |
<div class="collapsible-body"><span> | <div class="collapsible-body"><span> | ||
Line 1,965: | Line 2,310: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p>Preparation for 3h, 5h, 8h, 24h, 30h CV and Bactiter-Glo Assay.</p></div> |
− | <div class="collapsible-body"><span> | + | <div class="collapsible-body"><span> |
+ | <b>Goal:</b> | ||
+ | |||
+ | <p>Redo CV assay from 17th August to check the validity of previous results.</p> | ||
+ | |||
+ | <p>Perform Bactiter-Glo Assay parallell to CV Assay (3h, 5h, 8h, 24h, 30h) to examine the amount of living cells in biofilm.</p> | ||
+ | |||
+ | <b>Procedure:</b> | ||
+ | |||
+ | <p>Crystal Violet Assay: Same procedure as from 17.08.2018.</p> | ||
+ | |||
+ | <p> Bactiter-Glo Assay</p> | ||
+ | |||
+ | </span></div> | ||
</li> | </li> | ||
<li> | <li> | ||
Line 1,980: | Line 2,338: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p>No lab</p></div> |
− | <div class="collapsible-body"><span> | + | <div class="collapsible-body"><span>No lab.</span></div> |
</li> | </li> | ||
<li> | <li> | ||
Line 1,995: | Line 2,353: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p>No lab</p></div> |
− | <div class="collapsible-body"><span> | + | <div class="collapsible-body"><span>No lab.</span></div> |
</li> | </li> | ||
<li> | <li> | ||
Line 2,010: | Line 2,368: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p>No lab</p></div> |
− | <div class="collapsible-body"><span> | + | <div class="collapsible-body"><span>No lab.</span></div> |
</li> | </li> | ||
<li> | <li> | ||
Line 2,025: | Line 2,383: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p>No lab</p></div> |
− | <div class="collapsible-body"><span> | + | <div class="collapsible-body"><span>No lab.</span></div> |
</li> | </li> | ||
Line 2,035: | Line 2,393: | ||
<!------------------------------------------- END OF WEEK ---------------------------------------------> | <!------------------------------------------- END OF WEEK ---------------------------------------------> | ||
− | |||
+ | <!------------------------------------------- WEEK ---------------------------------------------------> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Week | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 35 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p style="font-size:120%;">Week 35</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <!----------------------------------------- DAYS IN WEEK -------------------------------------------> | ||
+ | <ul class="collapsible"> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Aug | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 27 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>No lab</p></div> | ||
+ | <div class="collapsible-body"><span>No lab.</span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Aug | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 28 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>No lab</p></div> | ||
+ | <div class="collapsible-body"><span>No lab.</span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Aug | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 29 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>No lab</p></div> | ||
+ | <div class="collapsible-body"><span>No lab.</span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Aug | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 30 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>No lab</p></div> | ||
+ | <div class="collapsible-body"><span>No lab.</span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Aug | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 31 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>No lab</p></div> | ||
+ | <div class="collapsible-body"><span>No lab.</span></div> | ||
+ | </li> | ||
+ | </ul> | ||
+ | <!-------------------------------------- END OF DAYS IN WEEK ----------------------------------------> | ||
+ | |||
+ | </li> | ||
+ | |||
+ | <!------------------------------------------- END OF WEEK ---------------------------------------------> | ||
+ | |||
+ | <!------------------------------------------- WEEK ---------------------------------------------------> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Week | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 36 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p style="font-size:120%;">Week 36</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | |||
+ | <!----------------------------------------- DAYS IN WEEK -------------------------------------------> | ||
+ | <ul class="collapsible"> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Sept | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 3 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>No lab</p></div> | ||
+ | <div class="collapsible-body"><span>No lab.</span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Sept | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 4 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>No lab</p></div> | ||
+ | <div class="collapsible-body"><span>No lab.</span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Sept | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 5 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Introduction of site directed mutagenesis on pdCas9 and make medium for V. natrigens</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <b>Goal:</b> | ||
+ | |||
+ | <p>Make LB medium and 10x v2 salts for Vibrio natrigens</p> | ||
+ | <p>Amplify and introduce site directed mutagenesis in pdCas9</p> | ||
+ | |||
+ | <b>Procedure:</b> | ||
+ | |||
+ | <p> LB - medium </p> | ||
+ | |||
+ | <p>10x v2 salts:</p> | ||
+ | |||
+ | Make the salt solutions after the following recipe: | ||
+ | |||
+ | <ul> | ||
+ | <li>11.935 g NaCl (204 mM)</li> | ||
+ | |||
+ | <li>0.3134 g KCl (4.2 mM)</li> | ||
+ | |||
+ | <li>4.710 g MgCl2*6H2O (23.14 mM)</li> | ||
+ | |||
+ | <li>1 L ddH2O</li> | ||
+ | |||
+ | </ul> | ||
+ | |||
+ | <p>Site directed mutagenesis:</p> | ||
+ | |||
+ | Forward and reverse primers for site directed mutagenesis were designed and ordered from Sigma Aldrich. | ||
+ | |||
+ | Introduce site directed mutagenesis in pgCas9 via PCR after following the protocol from 29. June. 2018. | ||
+ | |||
+ | The first PCR was not successful. The primer annealing temperature was changed, and the elongation time as well. | ||
+ | </span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Sept | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 6 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Introduce site directed mutagenesis in pdCas9 and amplify RRvT and pSB1C3e</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <p><b>Goal:</b> | ||
+ | |||
+ | Introduce site directed mutagenesis in pdCas9 | ||
+ | Amplify RRvT and pSB1C3 via PCR </p> | ||
+ | |||
+ | |||
+ | |||
+ | <p><b>Procedure:</b> | ||
+ | |||
+ | Site directed mutagenesis in dCas9: | ||
+ | |||
+ | pdCas9 was amplified via gradient PCR, where the annealing temperatures were 57.3 ℃, 59.3 ℃, 61.1 ℃ and 64.1℃ with an elongation time for 5 min. | ||
+ | |||
+ | The samples were stored in the fridge after the PCR was finished. | ||
+ | |||
+ | Amplification of RRvT and pSB1C3: | ||
+ | |||
+ | RRvT and pSB1C3 fragments were amplified by running the samples (6 µL FW primer, 6 µL REV primer, 1 µL template, 12.5 µL Takara Hi-Fi PCR premix) on PCR with the following settings: annealing temperature 37 ℃ for 10 s, elongation temperature 72 ℃ for 1 min. | ||
+ | |||
+ | The samples were stored in the fridge after the PCR was finished. </p></span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Sept | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 7 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Gel purification of PCR products (pdCas9, RRvT and pSB1C3), incubate V. natriegens</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <b>Goal:</b> | ||
+ | |||
+ | <p>Separate the PCR products of RRvT and pSB1C3 on gel, and miniprep the desired fragments on the gel. | ||
+ | Incubate Vibrio natreigens (V. natriegens). | ||
+ | Do another round of site directed mutagenesis on pdCas9 via PCR.</p> | ||
+ | <b>Procedure:</b> | ||
+ | |||
+ | <b>Gel purification of RRvT and pSB1C3 on gel:</b> | ||
+ | |||
+ | <p> 5 μL loading dye was added to the PCR products (25.5 μL). | ||
+ | The PCR products were separated on Gel green (90 V, 40 min). | ||
+ | The desired fragments were cut out from the gel and collected in eppendorf tubes | ||
+ | Gel digestion and DNA isolation of RRvT and fragment of pSB1C3: | ||
+ | |||
+ | The PCR products with the desired length on the gel was isolated by following after the same protocol from 02.07.2018.</p> | ||
+ | |||
+ | <b>Inoculation and incubation of V. natriegens:</b> | ||
+ | |||
+ | <p>Sample of V. natriegens sent by the iGEM team from Marburg, was inoculated and incubated by following after the protocol provided by the team.</p> | ||
+ | |||
+ | <b>Introduce site directed mutagenesis in pdCas9: </b> | ||
+ | |||
+ | <p>PCR mix with pdCas9 was prepared after following the same protocol from 29.06.2018. | ||
+ | Two samples were set on two different programs: | ||
+ | 3 step PCR: DNA denaturation temperature at 98℃, primer annealing temperature at 55 ℃ for 10 s, elongation temperature at 72 ℃ for 7 min. | ||
+ | 2 step PCR: same conditions as 3 step PCR without the primer annealing step.</p> | ||
+ | </span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Sept | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 8 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Purification of RRvT, separation of PCR product of pdCas9 and measurement of growth curve of V. natriegens (failed)</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <b>Goal:</b> | ||
+ | |||
+ | <ul> | ||
+ | <li>Measure the growth curve of V. natrigens</li> | ||
+ | <li>Gel purification of RRvT</li> | ||
+ | <li>Separte the PCR products of pdCas9 on gel</li> | ||
+ | </ul> | ||
+ | |||
+ | <b>Procedure:</b> | ||
+ | |||
+ | <p>Growth curve of V. natrigens:</p> | ||
+ | |||
+ | <p>The experiment failed due to dilution in the flasks and not in the cuvettes</p> | ||
+ | |||
+ | <p>Gel purification of RRvT:</p> | ||
+ | |||
+ | <p>The PCR product of RRvT was purified on gel, and the DNA was isolated after following the same protocol from 02.07.2018.</p> | ||
+ | |||
+ | <p>Gel separation of pdCas9 PCR product:</p> | ||
+ | |||
+ | <p>The PCR products of pdCas9 were separated on both gel red and gel green for imaging and for isolation of the desired fragments by following the same protocol from 02.07.2018.</p> | ||
+ | |||
+ | <p> See results page for results </p>. | ||
+ | |||
+ | </span></div> | ||
+ | </li> <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Sept | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 9 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Amplification of RRvT and introduce SDM in pdCas9</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <p><b>Goal:</b></p> | ||
+ | |||
+ | <p>Amplify RRvT and introduce SDM in pdCas9 via PCR</p> | ||
+ | |||
+ | <p><b>Procedure:</b></p> | ||
+ | |||
+ | <p>RRvT and introduction of pdCas9 was necessary since the concentration of the products isolated from gel on 08.09.2018 were too low.</p> | ||
+ | |||
+ | <p>Amplification of RRvT:</p> | ||
+ | |||
+ | <p>RRvT was amplified via PCR with an annealing temperature 55 ℃ for 10 s and elongation temperature at 72 ℃ for 1 min.</p> | ||
+ | |||
+ | <p>Introduce SDM in pdCas9:</p> | ||
+ | |||
+ | <p>Site directed mutagenesis was introduced via PCR with an annealing temperature at 55 ℃ for 10 s and elongation temperature 72 ℃ for 7 min.</p> | ||
+ | |||
+ | <p>The products were stored in the fridge.</p> </span></div> | ||
+ | </li> | ||
+ | |||
+ | </ul> | ||
+ | <!-------------------------------------- END OF DAYS IN WEEK ----------------------------------------> | ||
+ | |||
+ | </li> | ||
+ | |||
+ | <!------------------------------------------- END OF WEEK ---------------------------------------------> | ||
+ | <!------------------------------------------- WEEK ---------------------------------------------------> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Week | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 37 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p style="font-size:120%;">Week 37</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | |||
+ | <!----------------------------------------- DAYS IN WEEK -------------------------------------------> | ||
+ | <ul class="collapsible"> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Sept | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 10 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Gibson assembly of RRvT and backbon and transformation of SDM pdCas9 and assembled RRvT into competent cells</p></div> | ||
+ | <div class="collapsible-body"><span><p> | ||
+ | <b>Goal:</b> | ||
+ | |||
+ | <p>Gel purification of PCR products | ||
+ | Gel digestion and isolation of desired DNA fragments | ||
+ | Assemble RRvT and pSB1C3 via Gibson assembly | ||
+ | Transform pdCas9 and the assembled RRvT into competent cells</p> | ||
+ | |||
+ | <b>Procedure:</b> | ||
+ | |||
+ | <p>Gel purification: | ||
+ | |||
+ | The PCR products were separated on gel green | ||
+ | |||
+ | RRvT: 25.5 µL DNA, 5.05 µL loading dye | ||
+ | |||
+ | pdCas9: 25 µL DNA, 5 µL loading dye</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Gel digestion and DNA isolation:</p> | ||
+ | |||
+ | |||
+ | <p>The desired fragments (RRvT: approx. 2000 bp, pdCas9: approx. 6000 – 7000 bp) were cut out from the gel. The gel was digested by following after the protocol from 02.07.18.</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Transformation of SDM pdCas9 into competent cells:</p> | ||
+ | |||
+ | <p>6 µL DNA was transformed into competent cells by following after the protocol from 25.06.18.</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Gibson assembly of RRvT and pSB1C3:</p> | ||
+ | |||
+ | <p>The fragments were assembled together by following the protocol provided from the kit | ||
+ | |||
+ | 2 µL RRvT, 8 µL pSB1C3 (0.03 – 0.2 pmol fragments), 10 µL assembly master mix was incubated in a thermocycler at 50C for 15 min. The sample was stored on ice for transformation.</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Transformation of assembled RRvT and pSB1C3 into competent cells:</p> | ||
+ | |||
+ | <p>2 µL Gibson assembly product was transformed into competent cells by following after the protocol from 25.06.2018. </p></span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Sept | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 11 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>PCR colony screening, isolation and verify successful SDM on pdCas9</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <p><b>Goal:</b></p> | ||
+ | |||
+ | <ul> | ||
+ | <li>PCR colony screening of RRvT gene</li> | ||
+ | <li>Isolate pdCas9 from cell cultures</li> | ||
+ | <li>Verify successful SDM on pdCas9 by restriction digest the plasmid</li> | ||
+ | </ul> | ||
+ | |||
+ | <p><b>Procedure:</b></p> | ||
+ | |||
+ | <p>PCR colony screening:</p> | ||
+ | |||
+ | <p>None of the colonies were red/ pink coloured like the colonies with RFP.</p> | ||
+ | |||
+ | <p>PCR colony screening was done to test whether assembly of RRvT and pSB1C3 fragments was successful</p> | ||
+ | |||
+ | <p>PCR mix was prepared after the following protocol: | ||
+ | 5 µL Takara Hi-Fi PCR premix, 1 µL ddH2O, 6 µL RRvT FWD primer, 6 µL RRvT REV primer | ||
+ | 8 different colonies were chosen and transferred to a new agar plate with CM, before the colony was transferred to a PCR tube with PCR mix. | ||
+ | The samples ran on a PCR machine with the same settings from day 28 – 06. 09. 2018.</p> | ||
+ | |||
+ | |||
+ | <p>Plasmid isolation:</p> | ||
+ | |||
+ | <p>pdCas9 with SDM was isolated from three cell replicates by following the protocol from day 3 – 22. 06. 2018.</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Restriction digest:</p> | ||
+ | |||
+ | <p>Introduction of SDM in pdCas9 was verified by adding restriction enzyme which originally recognize and cut at a specific site in the plasmid. EcoRI has two restriction sites in pdCas9 before any mutations.</p> | ||
+ | |||
+ | <p>Mix 2 µL DNA (pdCas9 SDM), 2 µL Cut smart buffer, 15.5 µL ddH2O, 0.5 µL EcoRI Hi-Fi | ||
+ | Spin down the solutions | ||
+ | Incubate overnight at 37 ℃</p> | ||
+ | </span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Sept | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 12 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Gel separation of digested pdCas9 (SDM) and products from PCR colony screening of RRvT, amplification of pdCas9 fragments for Gibson assembly</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <p><b>Goal:</b></p> | ||
+ | |||
+ | <ul> | ||
+ | <li>Separate the DNA fragments of pdCas9 SDM after restriction digest</li> | ||
+ | <li>Visualize the products from PCR colony screening on gel</li> | ||
+ | <li>Amplify the different fragments of pdCas9 for Gibson assembly</li> | ||
+ | <li>Inoculate colonies with RRvT in LB medium with CM</li> | ||
+ | </ul> | ||
+ | |||
+ | <p><b>Procedure:</b></p> | ||
+ | |||
+ | <p>Gel electrophoresis:</p> | ||
+ | |||
+ | <p>Both pdCas9 fragments obtained from restriction digest, and the products from PCR colony screening of RRvT were separated and visualized on gel by mixing the DNA with loading dye</p> | ||
+ | |||
+ | <p>RRvT: 3 µL DNA, 2 µL dye, 7 µL ddH2O</p> | ||
+ | |||
+ | <p>pdCas9: add 4 µL loading dye to each samples</p> | ||
+ | |||
+ | <p>The DNA fragments were separated on gel red.</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Preparation for Gibson assembly of pdCas9:</p> | ||
+ | |||
+ | <p>Segments for Gibson assembly were obtained by amplify the desired fragments with designed primer pairs via PCR.</p> | ||
+ | |||
+ | <p>Primers for Gibson assembly (ordered from Sigma Aldrich), were resuspended with ddH2O and diluted to 1 µ | ||
+ | Dilute pdCas9 SDM – 2 µL DNA (PC1), 8 µL ddH2O (to obtain <26 ng/µL) | ||
+ | PCR samples (1 µL diluted template (pdCas9 SDM, <26 ng/μL), 6 µL FWD primer, 6 µL REV primer, 12.5 µL Takara HI-FI PCR premix) were incubated in PCR machine with the same settings from day 29 – 07. 09. 2018.</p> | ||
+ | |||
+ | |||
+ | <p>Inoculate cell colonies with RRvT:</p> | ||
+ | |||
+ | <p>Colonies with RRvT was inoculated in LB medium with CM from the agar plate, and the cell cultures were incubated overnight at 37 ℃ with shaking.</p> | ||
+ | |||
+ | <p>Cells were inoculated from the following agar plate. | ||
+ | Cells with RFP were revived in LB medium with CM.</p></span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Sept | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 13 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Gel purification, isolation and Gibson assemble the PCR products of pdCas9 fragments, transformation of Gibson assembled product, fluorescence test round of RRvT</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <p><b>Goal:</b></p> | ||
+ | |||
+ | <ul> | ||
+ | <li>Gel purification of the PCR product of pdCas9 fragments</li> | ||
+ | <li>Gel digestion and isolation of the pdCas9 fragments</li> | ||
+ | <li>Gibson assemble the pdCas9 fragments</li> | ||
+ | <li>Transformation of Gibson assembled product into competent cells</li> | ||
+ | <li>Test round of RRvT by measuring the fluorescence</li> | ||
+ | </ul> | ||
+ | |||
+ | <p><b>Procedure:</b></p> | ||
+ | |||
+ | <p>Gel purification of pdCas9 fragments:</p> | ||
+ | |||
+ | <p>25.5 µL PCR products were mixed with 5.05 µL loading dye, and separated on gel by following after the same procedure from 22.06.2018.</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Gel digest and DNA isolation:</p> | ||
+ | |||
+ | <p>After gel electrophoresis, the desired pdCas9 fragments were cut out from the gel. The gel was digested and the DNA fragments were isolated by conducting the same protocol from 02.07.2018.</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Gibson assembly of the pdCas9 fragments:</p> | ||
+ | |||
+ | <p>The pdCas9 fragments, isolated from the gel, were assembled after the following protocol</p> | ||
+ | |||
+ | <p>Mix 0.60 µL G1 fragment, 3.49 µL G2 fragment, 3.67 µL G3 fragment, 2.24 µL G4 fragment (the volumes were calculated by our instructor) with 10 µL NEBuilder HiFi DNA Assembly Master mix, and the sample was incubated at 50 ℃ for 1 hour.</p> | ||
+ | |||
+ | <p>The thermocycler was switched off without notice, so the samples stayed at room temperature for an hour before the thermocycler was turned on again…</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Transformation of Gibson assembly product:</p> | ||
+ | |||
+ | <p>2 µL Gibson assembly product was transformed into DH5α cells by following after the procedure from 25. 06. 2018</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Measure the fluorescence of RRvT:</p> | ||
+ | |||
+ | <p>The overnight cultures with RRvT, RFP and a negative control was diluted until target absorbance Abs600 = 0.1 | ||
+ | Four replicates of each culture (100 µL) were added to a 96 well microtiter plate. | ||
+ | The Absorbance and the fluorescence were measured with the following settings: | ||
+ | 150 cycles with 5 min interval | ||
+ | Emission wavelength: 607 nm | ||
+ | Exitation wavelength: 584 nm | ||
+ | Temperature: 37 ℃ | ||
+ | Gain: 22</p> | ||
+ | |||
+ | |||
+ | <p><b>Results:</b></p> | ||
+ | |||
+ | <p>Gel purification of pdCas9 fragments for Gibson assembly:</p> | ||
+ | |||
+ | <p>The order of the different fragments from left to right: ladder, G1, G2, G3 and G4. The fragments for Gibson assembly should have the length of 641 bp, 481 bp, 2917 bp and 1468 bp, respectively.</p> | ||
+ | |||
+ | <p>Fluorescence of RRvT:</p> | ||
+ | |||
+ | <p>The values of the fluorescence were too low when the samples were measured with a gain of 22. The liquid in the wells has been evaporated during the measurement.</p></span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Sept | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 14 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Inoculate successful transformed cells, Restreak V. natriegens, amplify gRNA and dCas9 for insertion into LITMUS28i vector</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <p><b>Goal:</b></p> | ||
+ | |||
+ | <ul> | ||
+ | <li>Inoculate successful transformed cells</li> | ||
+ | <li>Restreak V. natriegens on agar plates</li> | ||
+ | <li>Amplify gRNA and dCas9 (without mutation) sequence for insertion into LITMUS28i vector</li> | ||
+ | </ul> | ||
+ | |||
+ | <p><b>Procedure:</b></p> | ||
+ | |||
+ | <p>Colony picking:</p> | ||
+ | |||
+ | <p>Successful transformed cells (probably with correct Gibson Assembly product of pdCas9) were inoculated to LB medium with CM. The cell cultures were incubated at 37 ℃ overnight with shaking.</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Re-streak Vibrio natriegens on agar plates:</p> | ||
+ | |||
+ | <p>Vibrio natriegens was inoculated and was stoke on LA with v2 salt aseptically. The agar plates were incubated at room temperature.</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Amplification of gRNA and dCas9:</p> | ||
+ | |||
+ | <p>The primer pairs of gRNA and dCas9 (ordered from Sigma Aldrich) were diluted with ddH2O, so the concentration of the primers was 100 µM | ||
+ | The primers were further diluted until target concentration = 1 µM | ||
+ | PCR mix were prepared after the following recipe: | ||
+ | pgRNA (0.5 µL, 37.2 ng/ µL), 6 µL FWD primer, 6 µL REV primer, 12.5 µL Takara HiFi PCR premix. | ||
+ | pdCas9 (0.5 µL, 53.4 ng/ µL), 6 µL FWD primer, 6 µL REV primer, 12.5 µL Takara HiFi PCR premix. | ||
+ | The gRNA sequence was amplified by running the sample with a PCR machine with an annealing temperature 55 ℃ for 10 s, and an elongation temperature 72 ℃ for 1 min. The dCas9 sequence was amplified with an annealing temperature 55 ℃ for 10 s, and an elongation temperature 72 ℃ for 7 min.</p> </span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Sept | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 15 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Isolation, digestion of Gibson assembled pdCas9, gel digestion and isolation of gRNA and dCas9 fragments (for insertion into LITMUS28i), inoculation of V. natriegens</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <p><b>Goal:</b></p> | ||
+ | |||
+ | <ul> | ||
+ | <li>Isolate Gibson assembled pdCas9 from overnight cultures</li> | ||
+ | <li>Test digest the Gibson assembled pdCas9</li> | ||
+ | <li>Make glycerol stock of cells with Gibson assembled pdCas9 (pdCas9 mutated)</li> | ||
+ | <li>Gel separate the PCR products of gRNA and dCas9 (for insertion into LITMUS28i vector)</li> | ||
+ | <li>Gel digest and isolate the gRNA and dCas9 fragments (for insertion into LITMUS28i vector)</li> | ||
+ | <li>Inoculate natriegens in LB medium with v2 salts</li> | ||
+ | </ul> | ||
+ | |||
+ | <p><b>Procedure:</b></p> | ||
+ | |||
+ | <p>Isolation of Gibson assembled pdCas9:</p> | ||
+ | |||
+ | <p>Overnight cultures were diluted until OD600 ≈9 | ||
+ | pdCas9 was isolated from the cells by following after the miniprep protocol from 22.06.2018.</p> | ||
+ | |||
+ | |||
+ | <p>Test digest Gibson assembled pdCas9:</p> | ||
+ | |||
+ | <p>The enzymes EcoRI and XbaI were selected to verify whether the Gibson assembly of pdCas9 was successful or not. For 0.5 µL enzyme, 250 ng DNA is required. The different replicates were prepared by following recipe:</p> | ||
+ | |||
+ | <p>PC1: 5 µL DNA, 2 µL Buffer, 0.5 µL EcoRI, 0.5 µL XbaI, 12 µL ddH2O</p> | ||
+ | |||
+ | <p>PC2: 7 µL DNA, 2 µL Buffer, 0.5 µL EcoRI, 0.5 µL XbaI, 10 µL ddH2O</p> | ||
+ | |||
+ | <p>PC3: 12 µL DNA, 2 µL Buffer, 0.5 µL EcoRI, 0.5 µL XbaI, 5 µL ddH2O</p> | ||
+ | |||
+ | <p>The samples were incubated at 37 ℃ for 3h, before gel separation.</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Glycerol stock of Gibson assembled pdCas9 (pdCas9 mutated):</p> | ||
+ | |||
+ | <p>DH5α cells with the Gibson assembled pdCas9 were stored in glycerol stock at -80 ℃ by following after the procedure from day 28.06.2018.</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Gel separation of gRNA and dCas9 (not mutated) fragments (for insertion into LITMUS28i vector):</p> | ||
+ | |||
+ | <p>5 µL loading dye was added to each sample. The samples ran on gel green at 90 V for 50 min.</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Gel digest and DNA isolation:</p> | ||
+ | |||
+ | <p>The gRNA and dCas9 fragments were isolated from the gel by conducting the same protocol from 02.07.2018.</p> | ||
+ | |||
+ | |||
+ | <p>Incoulation of V. natriegens:</p> | ||
+ | |||
+ | <p>Coloies of V. natriegens were inoculated into LB medium with v2 salt. The cell cultures were incubated at 37 ℃ overnight with shaking.</p> | ||
+ | </span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Sept | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 16 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Transformation of plasmid with TetR into competent cells, mak glycerol stocks of V. natriegens</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <p><b>Goal:</b></p> | ||
+ | |||
+ | <ul> | ||
+ | <li>Transform the part BBa_R0040 (plasmid with TetR) into competent cells</li> | ||
+ | <li>Make glycerol stocks of natriegens</li> | ||
+ | </ul> | ||
+ | |||
+ | <p><b>Procedure:</b></p> | ||
+ | |||
+ | <p>Transformation of BBa_R004:</p> | ||
+ | |||
+ | <p>The plasmid was resuspended with 10 µL ddH2O in the well of the plate (provided by iGEM).</p> | ||
+ | |||
+ | <p>10 µL DNA was transformed into DH5α by following after the protocol from 25.06.2018.</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Glycerol stock of Vibrio natriegens:</p> | ||
+ | |||
+ | <p>Overnight cultures of V. natriegens was stored in glyrecol stock at -80 ℃.</p></span></div> | ||
+ | </li> | ||
+ | |||
+ | </ul> | ||
+ | <!-------------------------------------- END OF DAYS IN WEEK ----------------------------------------> | ||
+ | |||
+ | </li> | ||
+ | |||
+ | <!------------------------------------------- END OF WEEK ---------------------------------------------> | ||
+ | <!------------------------------------------- WEEK ---------------------------------------------------> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Week | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 38 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p style="font-size:120%;">Week 38</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | |||
+ | <!----------------------------------------- DAYS IN WEEK -------------------------------------------> | ||
+ | <ul class="collapsible"> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Sept | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 17 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Amplification of LITMUS28i vector, inoculation of successful transformed cells, revive cells with RRvT and RFP</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <p><b>Goal:</b></p> | ||
+ | |||
+ | <ul> | ||
+ | <li>Amplification of LITMUS28i sequence</li> | ||
+ | <li>Inoculate successful transformed cells with part BBa_R0040 (plasmid with TetR)</li> | ||
+ | <li>Revive cells with RRvT and RFP</li> | ||
+ | </ul> | ||
+ | |||
+ | <p><b>Procedure:</b></p> | ||
+ | |||
+ | <p>Amplification of LITMUS28i sequence:</p> | ||
+ | |||
+ | <ul> | ||
+ | <li>Designed primers (bought from Sigma Aldrich) were resuspended and diluted to 1 μM.</li> | ||
+ | <li>The LITMUS28i vector (sponsored by NEB) was diluted to 25 ng/μ</li> | ||
+ | <li>The diluted primer pair (6 μL of each primer) for LITMUS28i was mixed with the diluted LITMUS28i vector (1 μL) and Takara HiFi PCR premix (12.5 μL).</li> | ||
+ | <li>The LITMUS 28i sequence was amplified after running in a PCR machine with an annealing temperature of 55 ℃ for 10 s and elongation temperature 72 ℃ for 2 min.</li> | ||
+ | </ul> | ||
+ | |||
+ | <p>Inoculation of successful transformed cells:</p> | ||
+ | |||
+ | <p>Successful transformed cells with TetR was inoculated into LB medium with CM. The cell culture was incubated overnight at 37 ℃ with shaking.</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Revive cells with RRvT and RFP:</p> | ||
+ | |||
+ | <p>Cells stored at -80 ℃ were revived by inoculation into LB medium with CM and incubated overnight at 37 ℃ with shaker.</p> | ||
+ | </span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Sept | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 18 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Measure the fluorescence of RRvT, separation and isolation of LITMUS28i fragment, Gibson assemble LITMUS28i fragment, dCas9 and gRNA</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <p><b>Goal:</b></p> | ||
+ | |||
+ | <ul> | ||
+ | <li>Measure the fluorescence of RRvT, RFP and TetR</li> | ||
+ | <li>Separate LITMUS28i sequence on gel</li> | ||
+ | <li>Gel digest and isolate LITMUS28i segment</li> | ||
+ | <li>Gibson assemble LITMUS28i sequence, dCas9 and gRNA with anti-luxS</li> | ||
+ | </ul> | ||
+ | |||
+ | <p><b>Procedure:</b></p> | ||
+ | |||
+ | <p>Fluorescence measurement:</p> | ||
+ | |||
+ | <ul> | ||
+ | <li>The overnight cell cultures with RRvT, RFP and TetR were diluted to target Abs600 = 0,2.</li> | ||
+ | <li>100 μL of each cell cultures were pipetted to a 96 well plate with 4 replicates. The cellcultres were surrounded with LB medium with CM to reduce evaporation of the cell cultures in the wells. The plate was covered with a lid and the plate was sealed with parafilm.</li> | ||
+ | <li>The absorbance and the fluorescence were measured with a five-minute interval for 150 cycles with a target temperature 37 ℃. The gain was set to 40, wave length of absorbance was set to 588 nm, while the excitation and the emission wavelength were set to 584 nm and 607 nm, respectively.</li> | ||
+ | </ul> | ||
+ | |||
+ | <p>Gel electrophoresis:</p> | ||
+ | |||
+ | <p>05 μL loading dye was added to the PCR product of LITMUS28i vector (25 μL). | ||
+ | The PCR product was separated on gel green, and the desired sequence was cut out from the gel.</p> | ||
+ | |||
+ | |||
+ | <p>Gel digest and DNA isolation:</p> | ||
+ | |||
+ | <p>The desired DNA sequence was isolated by digesting the gel by conducting the same procedure from 02.07.2018.</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Gibson assembly:</p> | ||
+ | |||
+ | <p>LITMUS28i, dCas9 and gRNA with anti-luxS were assembled via Gibson assembly. The amount (pmol) required of the different fragments were calculated by the calculator provided by the homepage of NEB, and by following after the protocol of NEBuilder HiFi DNA Assembly</p> | ||
+ | |||
+ | <p>LITMUS28i sequence (2295 bp, 68 ng/μL): 0.8 μL | ||
+ | gRNA (538 bp, 43 ng/μL): 0.59 μL | ||
+ | dCas9 (5025 bp, 52 ng/ μL): 4.92 μL | ||
+ | NEBuilder HiFi DNA assembly master mix: 10 μL | ||
+ | ddH2O: 3.69 μL</p> | ||
+ | |||
+ | <p>The sample was incubated at 50 ℃ for an hour. The sample was stored in the fridge</p> | ||
+ | |||
+ | <p><b>Results:</b></p> | ||
+ | |||
+ | <p>Fluorescence measurement of RRvT:</p> | ||
+ | |||
+ | <p>The fluorescence of RRvT and RFP was constant over time, and the value of the fluorescence of RRvT and RFP was lower than the fluorescence measured from the medium...</p> | ||
+ | </span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Sept | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 19 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Measure growth curve of V. natriegens, transformation of Gibson assembled LITMUS28i, test digest mutated pdCas9</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <p><b>Goal:</b></p> | ||
+ | |||
+ | <ul> | ||
+ | <li>Measure the growth curve of V. natriegens</li> | ||
+ | <li>Transform Gibson assembled LITMUS28i (with unmutated dcas9 and gRNA with anti-luxS) into DH5α cells</li> | ||
+ | <li>Test digest the mutated pdCas9 with EcoRI and SpeI</li> | ||
+ | </ul> | ||
+ | |||
+ | <p><b>Procedure:</b></p> | ||
+ | |||
+ | <p>Growth curve of V. natriegens:</p> | ||
+ | |||
+ | <p>Overnight cultures were diluted to a target OD600 = 0.05 in 250 mL baffled flasks with a final volume 40 mL. | ||
+ | The cell cultures were incubated at 37 ℃ with shaking. | ||
+ | The OD600 of each replicate was measured after 10 min incubation for 5 hours.</p> | ||
+ | |||
+ | |||
+ | <p>Transformation of Gibson assembled LITMUS28i vector:</p> | ||
+ | |||
+ | <p>2 μL Gibson assembled LITMUS28i vector that consists unmutated dCas9 and gRNA with anti-luxS was transformed into competent cells after following the same procedure from 25.06.2018.</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Restriction digest the mutated pdCas9:</p> | ||
+ | |||
+ | <p>The mutated pdCas9 was cut with EcoRI and SpeI by mixing 5 μL DNA (PC1), 2 μL cut smart buffer, 0.5 μL EcoRI, 0.5 μL SpeI and 12 μL dH2O. The reagent was incubated overnight at 37 ℃.</p></span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Sept | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 20 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Gel separation of digested pdCas9 (mutated), preparation of ligation of mutated dCas9 and iGEM backcone</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <p><b>Goal:</b></p> | ||
+ | |||
+ | <p>Gel separation of the product from the enzyme digestion of mutated pdCas9</p> | ||
+ | <p>Digestion of mutated pdCas9 and pSB1C3 (preparation for ligation of dCas9 and pSB1C3).</p> | ||
+ | |||
+ | |||
+ | <p><b>Procedure:</b></p> | ||
+ | |||
+ | <p>Gel electrophoresis:</p> | ||
+ | |||
+ | <p>The products of enzyme digestion of mutated pdCas9 that has been incubated overnight, were mixed with 3.34 μL loading dye. The DNA segments were separated after running them on gel red at 90 V for 45 min.</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Digestion of mutated pdCas9 and pSB1C3:</p> | ||
+ | |||
+ | <p>The DNA were digested after the following recipe</p> | ||
+ | |||
+ | <p>pdCas9: 5 μL DNA (PC1, 50.8 ng/μL), 2 μL 2.1 buffer, 0.5 μL EcoRI, 0.5 μL PstI, 12 μL ddH2O. | ||
+ | |||
+ | Linear pSB1C3: 10 μL DNA (linear pSB1C3, 25 ng/μL), 2 μL 2.1 buffer, 0.5 μL EcoRI, 0.5 μL PstI, 7 μL ddH2O.</p> | ||
+ | |||
+ | <p>The samples were incubated at 37 ℃ overnight.</p></span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Sept | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 21 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Gel separation and DNA isolation of digested pSB1C3 and mutated pdCas9, isolation of Gibson assembled LITMUS28i vector from overnight cultures</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <p><b>Goal:</b></p> | ||
+ | |||
+ | <ul> | ||
+ | <li>Gel separate the overnight product of enzymatic digested mutated pdCas9 and linear pSB1C3.</li> | ||
+ | <li>Gel digestion and isolate the desired DNA fragments of mutated and enzymatic digested pdCas9 and pSB1C3.</li> | ||
+ | <li>Isolate Gibson assembled LITMUS28i vector (with unmutated dCas9 and gRNA) from overnight cultures</li> | ||
+ | <li>Test digest the Gibson assembled LITMUS28i vector, and separate on gel</li> | ||
+ | <ul> | ||
+ | |||
+ | <p><b>Procedure:</b></p> | ||
+ | |||
+ | <p>Gel separation of fragments of mutated pdCas9 and linear pSB1C3:</p> | ||
+ | |||
+ | <p>3.34 μL loading dye was added to each sample, and the fragment were separated on gel green at 90 V for 45 min.</p> | ||
+ | |||
+ | <p>The fragments with the desired length (dCas9: approx. 5000bp, backbone: approx. 2000bp) were cut out from the gel and collect in separate tubes.</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Gel digestion and DNA isolation:</p> | ||
+ | |||
+ | <p>The DNA fragments of mutated pdCas9 and pSB1C3 were isolated from the gel by following after the protocol form 02.07.2018.</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Plasmid isolation of Gibson assembled LITMUS28i vector:</p> | ||
+ | |||
+ | <p>The Gibson assembled LITMUS28i vector was isolated from two overnight cultures (L1 and L2) by following after the same protocol from 22.07.2018.</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Test digest the Gibson assembled LITMUS28i vector:</p> | ||
+ | |||
+ | <p>The vectors were digested with two different enzyme pairs.</p> | ||
+ | |||
+ | <p>The samples cut with AlwNI and EcoRI were incubated at 37 ℃ for 2 hours, while the samples cut with PstI and EcoRI were incubated for 1 hour.</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Gel separation of enzymatic digested L1 and L2:</p> | ||
+ | |||
+ | <p>3.34 μL loading dye was added to each sample, the DNA fragments were visualized by running them on gel red at 90 V for 45 min.</p> | ||
+ | |||
+ | <p><b>Results:</b></p> | ||
+ | |||
+ | <p>Successfully transformed cells with LITMUS28i (probably with dCas9 and gRNA with anti-luxS) | ||
+ | The concentrations of the fragments of mutated pdCas9 and pSB1C3 were too low (negative values)… | ||
+ | L2 may be the correct Gibson assembled phagemid. However, there is an extra segment with a length approx. 6000 bp. Probably, the enzymatic activity of AlwNI is slower compared to EcoRI and PstI, hence some fragments were not cut by AlwNI. In order to verify this, another sample of L2 was cut with AlwNI and EcoRI and incubated overnight at 37℃.</p></span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Sept | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 22 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Gel separation of digested mutated pdCas9, pSB1C3 and Gibson assembled LITMUS28i, DNA isolateion of digested pdCas9 and pSB1C3</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <p><b>Goal:</b></p> | ||
+ | |||
+ | <ul> | ||
+ | <li>Gel separation of fragments from enzymatic digested mutated pdCas9, linear pSB1C3 and Gibson assembled LITMUS28i vector.</li> | ||
+ | <li>Gel digestion and isolation of the desired DNA fragments of pdCas9 and linear pSB1C3.</li> | ||
+ | <li>Incubate new samples of mutated pdCas9 and linear pSB1C3 were incubate overnight with restriction enzymes.</li> | ||
+ | <li>Revive competent cells with mutated pdCas9 (PC1)</li> | ||
+ | </ul> | ||
+ | |||
+ | <p><b>Procedure:</b></p> | ||
+ | |||
+ | <p>Gel separation:</p> | ||
+ | |||
+ | <p>Fragments of mutated pdCas9 and pSB1C3 (digested with EcoRI and PstI overnight) were separated on gel green. The desired segments were cut out and isolated from the gel by following after the same procedures from 02.07.2018.</p> | ||
+ | |||
+ | <p>Fragments of L2 (incubated from yesterday – 21.09.2018) were digested with AlwNI and EcoRI, separated and visualized on gel red.</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Revive competent cells with mutated pdCas9:</p> | ||
+ | |||
+ | <p>Cells with PC1 stored at -80 ℃ were inoculated in LB medium with CM and incubated overnight at 37 ℃ with shaking.</p> | ||
+ | |||
+ | <p>We were running out of plasmids with mutated pdCas9, so it’s necessary to isolate the them from the cells again…</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Restriction digest mutated pdCas9 (PC2) and linear pSB1C3:</p> | ||
+ | |||
+ | <p>PC2: 10 μL DNA, 2 μL 2.1 buffer, 0.5 μL EcoRI, 0.5 μL PstI, 7 μL ddH2O</p> | ||
+ | |||
+ | <p>pSB1C3: 10 μL DNA, 2 μL 2.1 buffer, 0.5 μL EcoRI, 0.5 μL PstI, 7 μL ddH2O</p> | ||
+ | |||
+ | <p>The samples were incubated overnight at 37 ℃</p> | ||
+ | |||
+ | <p><b>Results:</b></p> | ||
+ | <p>The concentrations of the desired fragments of pdCas9 and pSB1C3 were too low to be detected. New samples of mutated pdCas9 and pSB1C3 were incubated with EcoRI and PstI overnight</p>.</span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Sept | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 23 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Ligation of mutated pdCas9 and pSB1C3, plasmid isolation, digestion of mutated pdCas9 and pSB1C3</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <p><b>Goal:</b></p> | ||
+ | |||
+ | <ul> | ||
+ | <li>Ligation of enzymatic digested pSB1C3 and mutated pdCas9</li> | ||
+ | <li>Plasmid isolation from overnight cultures</li> | ||
+ | <li>Digest the mutated pdCas9 and pSB1C3 with restriction enzymes</li> | ||
+ | </ul> | ||
+ | |||
+ | <p><b>Procedure:</b></p> | ||
+ | |||
+ | <p>Ligation of DNA fragments:</p> | ||
+ | |||
+ | <p>According to the protocol for ligation of DNA fragments, the amount of the fragments was calculated by using the NEBiocalculator.</p> | ||
+ | |||
+ | <p>We assume that all of the DNA is completely cut by the enzymes, so we have 400 ng dCas9 and 250 ng digested backbone</p> | ||
+ | |||
+ | <p>The concentration of PC2 is 40 ng/μL and 10 μL pdCas9 was cut with enzymes, while the concentration of linear pSB1C3 was 25 ng/ μL and 10 μL was digested.</p> | ||
+ | |||
+ | <p>If we would like to have 25 ng backbone in the reaction solution, we should have approx. 181.3 ng dCas9 according to NEBiocalculator with the ratio of 3:1 for insert and backbone.</p> | ||
+ | |||
+ | <p>The theoretical concentration of the digested pdCas9 is 20 ng/ μL (total 400 ng plasmid was cut, and the final volume in the restriction digest tube was 20 μL), and 12.5 ng/ μL for the digested pSB1C3 (total 250 ng linear pSB1C3 was cut, and the final volume in the restriction digest tube was 20 μL).</p> | ||
+ | |||
+ | <p>Thus, the volume of the different compounds for ligation is</p> | ||
+ | |||
+ | <ul> | ||
+ | <li>2 μL T4 DNA ligase buffer</li> | ||
+ | |||
+ | <li>1 μL T4 DNA ligase</li> | ||
+ | |||
+ | <li>2 μL Backbone </li> | ||
+ | |||
+ | <li>10 μL dCas9 </li> | ||
+ | |||
+ | <li>5 μL ddH2O</li> | ||
+ | |||
+ | <li>Total volume: 20 μL</li> | ||
+ | </ul> | ||
+ | |||
+ | <p>The sample was incubated at 16 ℃ overnight</p> | ||
+ | |||
+ | <p>P.S. The fragments were not separated on gel before ligation (after so many times of failure to isolate DNA from gel…), wrong insert or re-ligation of pdCas9 fragments may occur…</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Plasmid isolation from competent cells:</p> | ||
+ | |||
+ | <p>The plasmid with mutated pdCas9 was isolated from two cell cultures by following the same procedure from 02.07.2018.</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Enzymatic digestion of mutated psCas9 and linear pSB1C3:</p> | ||
+ | |||
+ | <p>PCI: 17 μL DNA, 2 μL 2.1 buffer, 0.5 μL EcoRI, 0.5 μL PstI</p> | ||
+ | |||
+ | <p>Dried linearized pSB1C3 was resuspended with 10 μL ddH2O to obtain the final concentration 100 ng/ μL</p> | ||
+ | |||
+ | <p>pSB1C3: 9 μL DNA (100 ng/ μL), 2 μL 2.1 buffer, 0.5 μL EcoRI, 0.5 μL PstI, 8 μL ddH2O</p> | ||
+ | |||
+ | <p>The samples were incubated overnight at 37 ℃.</p></span></div> | ||
+ | </li> | ||
+ | |||
+ | </ul> | ||
+ | <!-------------------------------------- END OF DAYS IN WEEK ----------------------------------------> | ||
+ | |||
+ | </li> | ||
+ | |||
+ | <!------------------------------------------- END OF WEEK ---------------------------------------------> | ||
+ | <!------------------------------------------- WEEK ---------------------------------------------------> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Week | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 39 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p style="font-size:120%;">Week 39</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | |||
+ | <!----------------------------------------- DAYS IN WEEK -------------------------------------------> | ||
+ | <ul class="collapsible"> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Sept | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 24 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Gel separation and DNA isolation of digested pSB1C3 and mutated dCas9, transformation of ligation product, amplification of mutated pdCas9 and pSB1C3</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <p><b>Goal:</b></p> | ||
+ | |||
+ | <ul> | ||
+ | <li>Separation of DNA fragments on gel</li> | ||
+ | <li>Gel digestion and DNA isolation of dCas9 and pSB1C3</li> | ||
+ | <li>Transformation of ligation product</li> | ||
+ | <li>Amplify mutated dCas9 and linear pSB1C3</li> | ||
+ | </ul> | ||
+ | |||
+ | <p><b>Procedure:</b></p> | ||
+ | |||
+ | <p>Gel electrophoresis:</p> | ||
+ | |||
+ | <p>Enzymatically digested pdCas9 and pSB1C3 (prepared from yesterday - 23.09.2018) were separated on gel green at 90 V for 45 min.</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Gel digestion and DNA isolation:</p> | ||
+ | |||
+ | <p>The desired fragments of dCas9 and backbone were cut out from the gel. The DNA fragments were further isolated by following after the same procedure fromn02.07.2018.</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Transformation of ligation product into competent cells:</p> | ||
+ | |||
+ | <p>Heat inactivate the ligase at 65 ℃ for 20 min | ||
+ | Transform 5 μL of ligation product into competent cells by following the protocol from 25.06.2018 | ||
+ | P.S. The fragments were not separated on gel before ligation (after so many times of failure to isolate DNA from gel…), wrong insert or re-ligation of pdCas9 fragments may occur… so inoculate more colonies and store one of the plates sealed with parafilm in the fridge.</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Amplify mutated pdCas9 and pSB1C3: | ||
+ | |||
+ | <p>PCR mix for amplification of pdCas9 and pSB1C3 were prepared by mixing:</p> | ||
+ | |||
+ | <p>pdCas9: 0.5 μL template (PCII, 65.8 ng/ μL), 6 μL FWD GA1 primer, 6 μL REV GA3 primer, 12.5 μL Takara HiFi PCR premix.</p> | ||
+ | |||
+ | <p>This sample was amplified in a PCR machine with an annealing temperature at 55 ℃ for 10 s, and an elongation temperature at 72 ℃ for 7 min.</p> | ||
+ | |||
+ | <p>pSB1C3: 1 μL template (linear pSB1C3, 25 ng/ μL), 6 μL FWD primer, 6 μL REV primer, 12.5 μL Takara HiFi PCR premix.</p> | ||
+ | |||
+ | <p>The sample of pSB1C3 ran in a PCR machine with an annealing temperature at 55 ℃ for 10s, and an elongation temperature 72 ℃ for 2 min.</p> | ||
+ | |||
+ | <p>Nanodrop - mutated dCas9 and backbone:</p> | ||
+ | |||
+ | <p>The concentrations of enzymatically digested pdCas9 and pSB1C3 were too low to be detected (negative values).</p> | ||
+ | |||
+ | <p>Therefore, the mutated pdCas9 and pSB1C3 were amplified via PCR to increase the amount. Further we plan on cutting the PCR product with restriction enzymes over two nights, before separation on gel and isolate the desired fragments. This may increase the concentration of the products after gel digestion. Probably, heat inactivation of the restriction enzymes after gel digestion and DNA isolation may be a good idea (most of the enzymes are separated from the DNA fragments on gel), before the ligation step.</p></span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Sept | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 25 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Restriction digest of PCR-amplified mutdCas9 and pSB1C3; Media and agarose gel preparation; Inoculation</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <p><b>Goal:</b></p> | ||
+ | |||
+ | <ul> | ||
+ | <li>Restriction digest of PCR-amplified mutated dCas9 and pSB1C3</li> | ||
+ | <li>Make LB and M63B1 medium</li> | ||
+ | <li>Make 0.8% agarose GelRed and GelGreen</li> | ||
+ | <li>Inoculation of LB medium with transformed bacteria</li> | ||
+ | </ul> | ||
+ | |||
+ | <p><b>Procedure:</b></p> | ||
+ | |||
+ | <p>Restriction digest of mutated dCas9 and pSB1C3:</p> | ||
+ | |||
+ | <p>PCR-amplified dCas9 and pSB1C3 were digested in separate tubes. The restriction mixtures were made by combining:</p> | ||
+ | |||
+ | <ul> | ||
+ | <li>17 µL PCR-amplification product (mutated dCas9 or pSB1C3)</li> | ||
+ | <li>2 µL NEB 2.1 buffer</li> | ||
+ | <li>0.5 µL EcoRI-HF</li> | ||
+ | <li>0.5 µL PstI</li> | ||
+ | <li>The restriction mixtures were incubated at 37 °C for two days.</li> | ||
+ | </ul> | ||
+ | |||
+ | |||
+ | <p>Media preparation</p> | ||
+ | |||
+ | <p>Both, LB and M63B1 medium were prepared as described previously (____). The pH was adjusted to 7.1-7.2 by adding NaOH. The media were autoclaved and stored for later use.</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Agarose gel preparation</p> | ||
+ | |||
+ | <p>For preparation of 200 mL of both GelGreen and GelRed 0.8% agarose gel, 1.6 g agarose was added to 200 mL 1xTAE. The solution was heated in a microwave until the agarose was completely dissolved (approximately 3 min at maximum heat). The gel was cooled down before 10 µL of dye (GelGreen or GelRed) was added.</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Colony picking and inoculation</p> | ||
+ | |||
+ | <p>Four colonies from agar plates with bacteria transformed with possibly ligated dCas9 and pSB1C3 were picked and inoculated in 25 mL LB medium containing 25 µL chloramphenicol. The cultures were incubated at 37 °C with shaking (225 rpm) until the next day.</p> | ||
+ | |||
+ | </span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Sept | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 26 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Miniprep and nanodrop of yesterday's cultures</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | |||
+ | <p><b>Goal:</b></p> | ||
+ | |||
+ | <p>Miniprep yesterday’s bacterial cultures</p> | ||
+ | <p>Measure quantity and quality of miniprep product (Nanodrop)</p> | ||
+ | |||
+ | <p><b>Procedure:</b></p> | ||
+ | |||
+ | <p>The OD600 value of the bacterial cultures from yesterday were measured. The cultures were diluted to a final OD600 value of about 1, and miniprepped following the ZR Plasmid Miniprep protocol. The isolated plasmids were nanodropped and stored at 4 °C till next day.</p></span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Sept | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 27 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>**Gel separation and purification of PCR-ampl. dCas9 and pSB1C3; Restriction digest of isolated plasmids from Sept. 25th-cultures</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <p><b>Goal:</b></p> | ||
+ | |||
+ | <ul> | ||
+ | <li>Gel separation and purification of digested PCR-amplified dCas9 and pSB1C3</li> | ||
+ | <li>Measure the quality and quantity of the purified product (Nanodrop)</li> | ||
+ | <li>Restriction digest of yesterday’s miniprep product</li> | ||
+ | </ul> | ||
+ | |||
+ | <p><b>Procedure:</b></p> | ||
+ | |||
+ | <p>Gel separation and purification of digested PCR-amplified dCas9 and pSB1C3</p> | ||
+ | |||
+ | <p>4 μL loading dye was added to the digested PCR-amplified dCas9 and pSB1C3 backbone and the total volume of the samples (24 μL) were run on a 0.8% agarose gel containing GelGreen. The bands at approximately 5000 bp and 2000 bp for dCas9 and pSB1C3, respectively, were excised from the gel. The plasmid fragments were further purified following the ZymocleanTM Gel DNA Recovery protocol, using 480 μL and 210 μL ADB buffer for dCas9 and pSB1C3 backbone, respectively. The concentration and quality of the products were measured using the Nanodrop.</p> | ||
+ | |||
+ | <p>Restriction digest of plamids isolated from colonies</p> | ||
+ | |||
+ | <p>Yesterday’s miniprepped plasmids from the bacterial cultures with potentially correctly ligated dCas9 into the pSB1C3 backbone were nanodropped and digested with EcoRI-HF and PstI at 37 °C for about 2 hours. The products was ran on a 0.8% agarose gel containing GelRed.</p> | ||
+ | |||
+ | <ul> | ||
+ | <li>7.5 μL dH2O</li> | ||
+ | <li>0.5 μL EcoRI-HF</li> | ||
+ | <li>0.5 μL PstI</li> | ||
+ | <li>2.0 μL NEB 2.1 buffer</li> | ||
+ | <li>10 μL miniprepped plasmids</li> | ||
+ | </ul></span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Sept | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 28 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Gel showed failed ligation of mut dCas9 and backbone, started new ligation process</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <p><b>Goal:</b></p> | ||
+ | |||
+ | <p>Analyze ligated mutdCas9 and backbone</p> | ||
+ | |||
+ | <p><b>Procedure:</b></p> | ||
+ | |||
+ | <p>Gel electrophoresis of enzyme digested mutated dCas9:</p> | ||
+ | |||
+ | <p>Ran tube 1, 2, 3 and 4 on gel electrophoresis. </p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Ligation of mutated dCas9 and iGEM-backbone:</p> | ||
+ | |||
+ | <p>Started ligation process of mutated dCas9 and iGEM-backbone from samples collected in the freezer. </p> | ||
+ | |||
+ | <p>How we did it:</p> | ||
+ | |||
+ | <ul> | ||
+ | <li>Added (in order) 2uL T4 DNA ligase buffer, 3uL backbone, 9,5 uL mutated dCas9, 4,5 uL ddH2O and 1uL T4 DNA ligase (thawed in room temperature, no contact with hands)</li> | ||
+ | |||
+ | <li>mixed gently by pipetting up and down</li> | ||
+ | |||
+ | <li>microfuged tubes at 16^C, 10 rpm in one minute.</li> | ||
+ | |||
+ | <li>incubated at 16*C over night</li> | ||
+ | </ul> | ||
+ | |||
+ | |||
+ | <p>Watered out DNA fragments from idt:</p> | ||
+ | |||
+ | <p> - Both DNA fragments from idt were watered out with 40 uL ddH2O till a concentration of 25ng/uL. stored in fridge.</p> | ||
+ | |||
+ | <p>Next step will be: PCR amplification->run gel and isolate -> nanodrop to find concentration -> Gibson assembly with primers (same primers as with RRvT biobrick)</p> | ||
+ | |||
+ | <p><b>Results:</b></p> | ||
+ | |||
+ | <p>Gel electrophoresis:</p> | ||
+ | |||
+ | <p>Had only two bands on gel, which meant that the backbone and the mutated dCas9 was not ligated correctly.</p></span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Sept | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 29 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Ligation of PCR amplified dCas9 and pSB1C3; Restriction digest of dCas9-fragments ordered from IDT</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <p><b>Goal:</b></p> | ||
+ | |||
+ | <p>Ligation of PCR-amplified dCas9 and pSB1C3</p> | ||
+ | <p>Restriction digest and ligation of dCas9 ordered from IDT in two separate parts</p> | ||
+ | |||
+ | <p><b>Procedure:</b></p> | ||
+ | |||
+ | <p>Ligation of PCR-amplified dCas9 and pSB1C3</p> | ||
+ | |||
+ | <p>The gel purified dCas9 and pSB1C3 backbone were heated at 80 °C for 20 min in order to heat kill any restriction enzymes still present in the samples. The ligation mixture was prepared as follows:</p> | ||
+ | |||
+ | <ul> | ||
+ | <li>2 μL T4 DNA ligase buffer</li> | ||
+ | <li>1 μL T4 DNA ligase</li> | ||
+ | <li>3 μL backbone</li> | ||
+ | <li>9 μL dCas9 (Note! Not fully 9 μL was added)</li> | ||
+ | <li>5 μL ddH2O</li> | ||
+ | <li>The fragments were incubated overnight at 16 ºC</li> | ||
+ | </ul> | ||
+ | |||
+ | <p>Restriction cutting and ligation of dCas9 ordered from IDT in two separate parts</p> | ||
+ | |||
+ | <p>The two dCas9 fragments were restriction digested in separate tubes with BtgI. The recipe for the restriction mixtures is given below. Each fragment was handled similarly.</p> | ||
+ | |||
+ | <ul> | ||
+ | <li>20 μL dCas9 (diluted yesterday)</li> | ||
+ | <li>1 μL BtgI</li> | ||
+ | <li>5 μL cutsmart buffer</li> | ||
+ | <li>24 μL dH2O</li> | ||
+ | </ul> | ||
+ | |||
+ | <p>The fragments were digested at 37 ºC for about 2 hours and the restriction enzymes were then heat killed at 80 ºC for 20 min. Finally, the separate dCas9 fragments were combined in ligation mixtures with varying concentrations of dCas9 and T4 DNA ligase buffer:</p> | ||
+ | |||
+ | <ul> | ||
+ | <li>2 μL | 2 μL | 2.5 μL T4 DNA ligase buffer</li> | ||
+ | <li>1 μL T4 DNA ligase (same for all)</li> | ||
+ | <li>5 μL | 10 μL | 15 μL dCas9 fragment 1</li> | ||
+ | <li>5 μL | 10 μL | 15 μL dCas9 fragment 2</li> | ||
+ | </ul> | ||
+ | |||
+ | <p>The ligation reaction was run overnight at 16 ºC.</p></span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Sept | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 30 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>**Transformation of PCR-amplified dCas9 and pSB1C3; Verification of ligated dCas9 fragments from IDT</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <p><b>Goal:</b></p> | ||
+ | |||
+ | <p>Transformation of PCR-amplified dCas9 and pSB1C3 into competent DH5α cells.</p> | ||
+ | <p>Verification of ligated dCas9 fragments from IDT</p> | ||
+ | |||
+ | <p><b>Procedure:</b></p> | ||
+ | |||
+ | <p>Transformation of PCR-amplified dCas9 and pSB1C3 into competent DH5a cells</p> | ||
+ | |||
+ | <p>Prior to the transformation, the T4 DNA ligase was heat killed at 80 ºC for 20 min. 5 μL of the ligation mixtures prepared September 28th and 29th was added to separate tubes of thawed competent DH5α cells. The cells were incubated on ice for 20 min, heat shocked at 42 ºC for 45 sek, 950 μL LB was added and the cells were further incubated for 1.5 hour at 37 ºC with shaking (225 rpm). 100 μL of the cell suspensions were added to agar plates containing chloramphenicol. The suspensions were then centrifuged at 6800 g for 4 min, and about 800 μL of supernatants were discharged. The cell pellets were resuspended in the remaining medium and plated.</p> | ||
+ | |||
+ | <p>Verification of ligated dCas9 fragments</p> | ||
+ | |||
+ | <p>The overnight ligation mixtures with the dCas9 fragments from IDT were heated at 80 ºC for 20 min. The total volume for each of the samples were run at 85 V for 45 min on an 0.8% agarose gel containing GelGreen. Fragments at 2000 bp and 3000 bp was excised from the gel and purified following the ZymocleanTM Gel DNA Recovery protocol. The recovered fragments were stored -20 ºC in case of further usage.</p></span></div> | ||
+ | </li></ul> | ||
+ | <!-------------------------------------- END OF DAYS IN WEEK ----------------------------------------> | ||
+ | |||
+ | </li> | ||
+ | |||
+ | <!------------------------------------------- END OF WEEK ---------------------------------------------> | ||
+ | <!------------------------------------------- WEEK ---------------------------------------------------> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Week | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 40 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p style="font-size:120%;">Week 40</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | |||
+ | <!----------------------------------------- DAYS IN WEEK -------------------------------------------> | ||
+ | <ul class="collapsible"> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Oct | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 1 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Single colony picking and inoculation (Bacteria with potentially correctly ligated PCR-amplifed dCas9 and pSB1C3)</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <p><b>Goal:</b></p> | ||
+ | |||
+ | <p>Check colony formation on yesterday’s prepared agar plates</p> | ||
+ | <p>If colonies, pick a few single colonies and make pure bacterial cultures</p> | ||
+ | |||
+ | <p><b>Procedure:</b></p> | ||
+ | |||
+ | <p>Colonies were visible on all 7 agar plates. 7 colonies were picked and inoculated in 25 mL LB with 25 μL chloramphenicol. The cultures were incubated overnight at 37 °C with shaking (225 rpm).</p></span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Oct | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 2 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Failed ligation of dCas9 and pSB13</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <p><b>Goal:</b></p> | ||
+ | |||
+ | <p>Verify successful ligation of mutated dCas9 and iGEM-backbone by:</p> | ||
+ | |||
+ | <ul> | ||
+ | <li>Isolating plasmids from overnight cultures</li> | ||
+ | <li>Digest the plasmids containing mutated pdCas9 ligated with pSB1C3.</li> | ||
+ | <li>Verify with gel electrophoresis</li> | ||
+ | </ul> | ||
+ | |||
+ | <p><b>Procedure:</b></p> | ||
+ | |||
+ | <p>Yesterday 7 colonies were picked and incubated in culture medium overnight. Today, plasmids from each culture were isolated using the miniprep protocol.</p> | ||
+ | |||
+ | <p>The concentrations in each parallel were found using Nanodrop. | ||
+ | After the plasmids were isolated they were digested using the BamH1 and Pst1 restriction enzymes (we used 3.5uL plasmids). If we have the correct plasmids, then there will be two fragments, one at 6181bp and one at 893bp.</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Gel electrophoresis is performed using GelRed and standard protocol.</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>The remaining plasmids from the plasmid isolation (not enzyme digested) are stored in the freezer in the phage-lab. They are in the brown case and are marked "dCas9 +bb 02.10.18".</p> | ||
+ | |||
+ | <p><b>Results:</b></p> | ||
+ | |||
+ | <p>Gel electrophoresis showed only one band at about 1000bp. Cannot explain why (only backbone should be at 2000bp)</p></span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Oct | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 3 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>No lab</p></div> | ||
+ | <div class="collapsible-body"><span>No lab</span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Oct | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 4 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Transformation of biobricks; Making of bacterial cultures (mutdCas9, RRvT and mRFP1)</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <p><b>Goal:</b></p> | ||
+ | |||
+ | <p>Transform biobrick BBa_K592009 (plate 1, well 19E) and BBa_K592010 (plate 6, well 17G) into competent DH5α cells</p> | ||
+ | <p>Make bacterial cultures of mutated dCas9 (with Addgene backbone), RRvT and mRFP1</p> | ||
+ | |||
+ | <p><b>Procedure:</b></p> | ||
+ | |||
+ | <p>Transformation</p> | ||
+ | |||
+ | <p>10 μL ddH2O was used to resuspend the biobricks. For the transformation, 1.5 μL of the biobrick resuspensions were added to competent DH5α cells. The transformation was performed as described in our protocol section with slight modification: 1.5 μL of the biobrick resuspensions were added to competent DH5α cells, and 950 μL LB added prior to a 1.5 hour incubation time. The cells were plated on agar plates with chloramphenicol as the selective marker.</p> | ||
+ | |||
+ | <p>Make bacterial cultures</p> | ||
+ | |||
+ | <p>Bacterial cultures with mutated dCas9 (with Addgene backbone), RRvT and mRFP1 was made by inoculating previously transformed stored bacterial stocks in 25 mL LB medium containing 25 μL chloramphenicol. The cultures were incubated at 37 °C with shaking.</p></span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Oct | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 5 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Miniprep and restriction cutting of biobrick blue+dcas</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <p><b>Goal:</b></p> | ||
+ | |||
+ | <p>- To get enough DNA for the backbone (blue) and dcas seperately to be ready for ligation. | ||
+ | |||
+ | <p><b>Procedure:</b></p> | ||
+ | |||
+ | <p>1. 2 colonies of blue biobrick were picked and inoculated in LB+CM for 6h until OD-0.3. Checked the OD of dCas culture and diluted to approximately 1,4. </p> | ||
+ | |||
+ | <p>2. Did a miniprep from the inoculated culture of blue biobrick(3 paralelles) + dcas(2 paralelles per culture)</p> | ||
+ | |||
+ | <p>3. Test digest with restriction enzymes Pst1 (0.5 ul) and EcoR1-HF (0,5 ul), with NEBuffer 2.1 (2 ul) and water (see table) overnight at 37 degrees.</p></span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Oct | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 6 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Gel electrophoresis and purification of digested mutdCas9 and biobricks; Repeated miniprep and digestion of biobricks</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <p><b>Goal:</b></p> | ||
+ | |||
+ | <ul> | ||
+ | <li>Gel elecrohoresis of yesterday’s digested mutated dCas9 and biobricks</li> | ||
+ | <li>If visible, gel purification of bands at appr. 2000 for the biobricks (= pSB1C3 backbone) and 5000 bp for dCas9</li> | ||
+ | <li>Measure quantity and quality of purified product (Nanodrop)</li> | ||
+ | </ul> | ||
+ | |||
+ | <p><b>Procedure:</b></p> | ||
+ | |||
+ | <p>Gel electrophoresis, purification and nanodrop</p> | ||
+ | |||
+ | <p>The restriction enzymes in each sample was heat killed at 80 °C for 20 min. 4 μL loading dye was added to the samples and the total volumes of each sample (24 μL) were run at 80 V for 45 min on a 0.8% agarose gel containing GelGreen. Since neither of the biobrick replicates (B1 and B2) gave any visible bands, only the 5000 bp bands for two of the mutated dCas9 replicates (1.1 and 1.2) was excised from the gel.</p> | ||
+ | |||
+ | <p>The gel purification was conducted following the ZymocleanTM Gel DNA Recovery protocol, using 216 μL and 252 μL ADB buffer for dCas9 sample 1.1 and 1.2, respectively. The quantity and quality of purified product using Nanodrop.</p> | ||
+ | |||
+ | <p>Addition to the planned goal: Miniprep of BBa_K592009 and BBa_K592010 transformed bacterial cultures</p> | ||
+ | |||
+ | <p>Since the biobricks did not give any visible bands on the gel, bacterial cultures with cells transformed with BBa_K592009 and BBa_K592010 were miniprepped again. The cultures were diluted to a final OD600 value of about 1, and then two of the cultures containing BBa_K592009 and one culture containing BBa_K592010 was miniprepped following the ZR Plasmid MiniprepTM protocol. The quantity and quality of the miniprep products were measured using the Nanodrop. The isolated biobricks were then digested by combining:</p> | ||
+ | |||
+ | <ul> | ||
+ | <li>15 μL sample (appr. 1500 ng, for all three samples)</li> | ||
+ | <li>0.5 μL EcoRI-HF</li> | ||
+ | <li>0.5 μL PstI</li> | ||
+ | <li>2 μL NEB 2.1 buffer</li> | ||
+ | <li>2 μL ddH2O</li> | ||
+ | </ul> | ||
+ | |||
+ | <p>The restriction mixtures were incubated overnight at 37 °C with shaking (225 rpm).</p></span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Oct | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 7 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Gel purification of digested biobricks; Ligation of mutdCas9 and digested biobrick backbone; Transformation of ligation mixture</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <p><b>Goal:</b></p> | ||
+ | |||
+ | <ul> | ||
+ | <li>Gel purification of overnight digested biobricks</li> | ||
+ | <li>Measure quantity and quality of the purified digested biobricks</li> | ||
+ | <li>Ligation of mutated dCas9 and digested biobricks</li> | ||
+ | <li>Transformation of ligation mixture into competent DH5α cells</li> | ||
+ | </ul> | ||
+ | |||
+ | <p><b>Procedure:</b></p> | ||
+ | |||
+ | <p>Gel purification of overnight digested biobricks</p> | ||
+ | |||
+ | <p>The overnight digested biobricks were heated at 80 °C for 20 min. Loading dye was added and the samples were run on a 0.8% agarose gel containing GelGreen. The bands at approximately 2000 bp was excised from the gel, and the fragments was recovered following the ZymocleanTM Gel DNA Recovery protocol. The quantity and quality of the purified digested biobricks were measured using the Nanodrop. </p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Ligation of mutated dCas9 and digested biobricks</p> | ||
+ | |||
+ | <p>The mutated dCas9 samples, which were gel purified yesterday, were ligated with the isolated pSB1C3 backbone of the biobricks. Two ligation mixtures was prepared using dCas9 1.1 and the backbone from BBa_K592009 (sample B2) and dCas9 1.2 and the backbone from BBa_K592010 (sample G2):</p> | ||
+ | |||
+ | <ul> | ||
+ | <li>2 μL T4 DNA ligase buffer</li> | ||
+ | <li>5 μL T4 DNA ligase</li> | ||
+ | <li>16 μL dCas9 1.1 (40.0 ng) | 16 μL dCas9 1.2 (33.6 ng)</li> | ||
+ | <li>1 μL pSB1C3 from BBa_ (40.1 ng) | 1 μL pSB1C3 from BBa_ (32.5 ng)</li> | ||
+ | <li>5 μL ddH2O</li> | ||
+ | <li>The ligation mixtures were incubated at 37 C for 2 hours.</li> | ||
+ | </ul> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Transformation of ligation mixture</p> | ||
+ | |||
+ | <p>10 μL of each ligation mixture was used in the transformation of competent DH5α cells. Also, 950 μL of LB was added prior to a 1.5 hours incubation period. Otherwise, the transformation was conducted as described in our protocol section.</p> | ||
+ | |||
+ | </span></div> | ||
+ | </li> | ||
+ | </ul> | ||
+ | <!-------------------------------------- END OF DAYS IN WEEK ----------------------------------------> | ||
+ | |||
+ | </li> | ||
+ | |||
+ | <!------------------------------------------- END OF WEEK ---------------------------------------------> | ||
+ | |||
+ | <!------------------------------------------- WEEK ---------------------------------------------------> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Week | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 41 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p style="font-size:120%;">Week 41</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | |||
+ | <!----------------------------------------- DAYS IN WEEK -------------------------------------------> | ||
+ | <ul class="collapsible"> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Oct | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 8 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>No lab</p></div> | ||
+ | <div class="collapsible-body"><span>No lab.</span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Oct | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 9 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Miniprep and shipment preparation of our biobricks: mutdCas9-pSB1C3 and RRvT</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <p><b>Goal:</b></p> | ||
+ | |||
+ | <p>Dilute bacterial cultures with correctly inserted dCas9 into pSB1C3 and cultures containing RRvT</p> | ||
+ | <p>Miniprep plasmids from bacterial cultures</p> | ||
+ | <p>Measure quantify and quality of miniprep product (Nanodrop)</p> | ||
+ | <p>Plate and air dry plasmids</p> | ||
+ | |||
+ | <p><b>Procedure:</b></p> | ||
+ | |||
+ | <p>The bacterial culture with correctly inserted dCas9 (verified yesterday by colony PCR) and a culture containg RRvT were diluted to an OD600 of about 0.2. The cultures were incubated at 37 °C with shaking (225 rpm) until the OD600 reached a value of approximately 1. The plasmids were isolated following the ZR Plasmid MiniprepTM protocol and the quantity and quality of the products were measured by the Nanodrop. The miniprepped products were then diluted to a final concentration of 50 ng/μL for each of the samples. 10 μL diluted mutated dCas9-pSB1C3 plasmid and 10 μL diluted RRvT-pSB1C3 plasmid was plated on the 96-well plate to be shipped to iGEM Headquarters. The samples were left to air dry in the fume hood until the next day.</p></span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Oct | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 10 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>No lab</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Oct | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 11 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Double transformation with pgRNA and new pdCas9</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <p><b>Goal:</b></p> | ||
+ | |||
+ | <p>1. Transformation of pgRNA and pdCas9 into DH5a and TG1-cells.</p> | ||
+ | |||
+ | |||
+ | <p><b>Procedure:</b></p> | ||
+ | |||
+ | <p> | ||
+ | Both pdCas9(2) and pgRNA(2) with anti-luxS were simultaneously transformed into competent cells (DH5α) after the following protocol:</p> | ||
+ | |||
+ | <ul> | ||
+ | <li>Thaw competent cells on ice.</li> | ||
+ | <li>Add pdCas9(2) (5μL) and pgRNA(2) with anti-luxS (5μL) to the same tube containing competent cells.</li> | ||
+ | <li>Incubate the cells on ice for 20min.</li> | ||
+ | <li>Heat shock the cells for 45s at 42℃.</li> | ||
+ | <li>Incubate the cells on ice for 2min.</li> | ||
+ | <li>Add LB- medium (900μL).</li> | ||
+ | <li>Incubate the cells for 1.5h (max. 2h) at 37℃ with shaker.</li> | ||
+ | <li>Plate the cells (100μL) on agar with AMP and CM </li> | ||
+ | <li>Centrifuge the cell culture for 3min at 6800g.</li> | ||
+ | <li>Discard the supernatant (200μL)</li> | ||
+ | <li>Resuspend the pellet with the remining supernatant in the tube</li> | ||
+ | <li>Plate the cells (100μL) on agar with AMP and CM.</li> | ||
+ | </ul> | ||
+ | |||
+ | <p><b>Results: </b><p> | ||
+ | |||
+ | <p>Colonies on the plates with DH5a. No colonies on the plates with TG1.</p></span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Oct | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 12 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>(Failed) Double transformation with pgRNA and new pdCas9 into TG1-cells.</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <p><b>Goal:</b></p> | ||
+ | |||
+ | <p>1. Transform pgRNA and new pdCas9 into TG1-cells. </p> | ||
+ | |||
+ | |||
+ | |||
+ | <p><b>Procedure:</b></p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Both pdCas9(2) and pgRNA(2) with anti-luxS were simultaneously transformed into competent cells (TG1) after the following protocol:</p> | ||
+ | |||
+ | <ul> | ||
+ | <li>Thaw competent cells on ice.</li> | ||
+ | <li>Add pdCas9(2) (5μL) and pgRNA(2) with anti-luxS (5μL) to the same tube containing competent cells.</li> | ||
+ | <li>Incubate the cells on ice for 20min.</li> | ||
+ | <li>Heat shock the cells for 45s at 42℃.</li> | ||
+ | <li>Incubate the cells on ice for 2min.</li> | ||
+ | <li>Add LB- medium (900μL).</li> | ||
+ | <li>Incubate the cells for 1.5h (max. 2h) at 37℃ with shaker.</li> | ||
+ | <li>Plate the cells (100μL) on agar with AMP and CM (make minimum 5 plates)</li> | ||
+ | <li>Centrifuge the cell culture for 3min at 6800g.</li> | ||
+ | <li>Discard the supernatant (200μL)</li> | ||
+ | <li>Resuspend the pellet with the remining supernatant in the tube</li> | ||
+ | <li>Plate the cells (100μL) on agar with AMP and CM.</li> | ||
+ | </ul> | ||
+ | |||
+ | <p><b>Results:</b></p> | ||
+ | |||
+ | <p>Bacteria colonies did not appear on agar plates the following day.</p> | ||
+ | </span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Oct | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 13 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>(Failed) Double transformation with pgRNA and new pdCas9 into TG1-cells.</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <p><b>Goal:</b></p> | ||
+ | |||
+ | <p>1. Transform pgRNA and new pdCas9 into TG1-cells. </p> | ||
+ | |||
+ | |||
+ | |||
+ | <p><b>Procedure:</b></p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Both pdCas9(2) and pgRNA(2) with anti-luxS were simultaneously transformed into competent cells (TG1) after the following protocol:</p> | ||
+ | |||
+ | <ul> | ||
+ | <li>Thaw competent cells on ice.</li> | ||
+ | <li>Add pdCas9(2) (5μL) and pgRNA(2) with anti-luxS (5μL) to the same tube containing competent cells.</li> | ||
+ | <li>Incubate the cells on ice for 20min.</li> | ||
+ | <li>Heat shock the cells for 45s at 42℃.</li> | ||
+ | <li>Incubate the cells on ice for 2min.</li> | ||
+ | <li>Add LB- medium (900μL).</li> | ||
+ | <li>Incubate the cells for 1.5h (max. 2h) at 37℃ with shaker.</li> | ||
+ | <li>Plate the cells (100μL) on agar with AMP and CM (make minimum 5 plates)</li> | ||
+ | <li>Centrifuge the cell culture for 3min at 6800g.</li> | ||
+ | <li>Discard the supernatant (200μL)</li> | ||
+ | <li>Resuspend the pellet with the remining supernatant in the tube</li> | ||
+ | <li>Plate the cells (100μL) on agar with AMP and CM.</li> | ||
+ | </ul> | ||
+ | |||
+ | <p><b>Results:</b></p> | ||
+ | |||
+ | <p>Bacteria colonies did not appear on agar plates the following day.</p> | ||
+ | </span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Oct | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 14 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Double transformation TG1 and miniprep of pgRNA</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <p><b>Goal:</b></p> | ||
+ | |||
+ | <p>- Transformation of TG1 cells with the new dCas sequence (with iGEM backbone) and pgRNA</p> | ||
+ | |||
+ | <p><b>Procedure:</b></p> | ||
+ | |||
+ | <p>1. Eluted DNA from DH5α-cells with only pgRNA by following the protocol for ZR miniprep. 4 tubes of miniprepped pgRNA was made and stored in the fridge.</p> | ||
+ | |||
+ | <p>2. Did a double transformation of TG1-cells with both pgRNA and dCas by following the same protocol as the day befor, but changing the volume of DNA added and the growing time before plating. Two paralelles of our supercompetent TG1-cells and two paralelles of TG1 (felles) were made. 10 μL of pgRNA and 10 μL of dCas was added to each of them, and they were growing for 3 hours before plating on LA-petri dishes with CM and AMP. </p> | ||
+ | |||
+ | <p><b>Results</b></p> | ||
+ | |||
+ | <p>Transformation was successfull.</p> | ||
+ | |||
+ | <p>Nanodrop results from the miniprep of cells with pgRNA:</p> | ||
+ | |||
+ | <style type="text/css"> | ||
+ | .tg {border-collapse:collapse;border-spacing:0;} | ||
+ | .tg td{font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:black;} | ||
+ | .tg th{font-family:Arial, sans-serif;font-size:14px;font-weight:normal;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:black;} | ||
+ | .tg .tg-0lax{text-align:left;vertical-align:top} | ||
+ | </style> | ||
+ | <table class="tg"> | ||
+ | <tr> | ||
+ | <th class="tg-0lax"></th> | ||
+ | <th class="tg-0lax">ng/ul</th> | ||
+ | <th class="tg-0lax">A260/A280</th> | ||
+ | <th class="tg-0lax">A260/A230</th> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td class="tg-0lax">1</td> | ||
+ | <td class="tg-0lax">41.8</td> | ||
+ | <td class="tg-0lax">1.65</td> | ||
+ | <td class="tg-0lax">0.85</td> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td class="tg-0lax">2</td> | ||
+ | <td class="tg-0lax">115.5</td> | ||
+ | <td class="tg-0lax">1.61</td> | ||
+ | <td class="tg-0lax">0.72</td> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td class="tg-0lax">3</td> | ||
+ | <td class="tg-0lax">43.8</td> | ||
+ | <td class="tg-0lax">1.91</td> | ||
+ | <td class="tg-0lax">1.87</td> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td class="tg-0lax">4</td> | ||
+ | <td class="tg-0lax">40.1</td> | ||
+ | <td class="tg-0lax">1.69</td> | ||
+ | <td class="tg-0lax">0.93</td> | ||
+ | </tr> | ||
+ | </table> | ||
+ | |||
+ | <p>Succesful transformation, all the plates from the samples containing our supercompetent cells had colonies.</p> | ||
+ | |||
+ | </span> | ||
+ | </li> | ||
+ | </ul> | ||
+ | <!-------------------------------------- END OF DAYS IN WEEK ----------------------------------------> | ||
+ | |||
+ | </li> | ||
+ | |||
+ | <!------------------------------------------- END OF WEEK ---------------------------------------------> | ||
+ | |||
+ | <!------------------------------------------- WEEK ---------------------------------------------------> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Week | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 42 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p style="font-size:120%;">Week 42</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | |||
+ | <!----------------------------------------- DAYS IN WEEK -------------------------------------------> | ||
+ | <ul class="collapsible"> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Oct | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 15 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Single colony pick, preparation of cell activity measurement</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <p><b>Goal: </b></p><p> Find out if the cell growth were affected by the prescence of tetracycline</p> | ||
+ | <p><b>Procedure</b></p> | ||
+ | <p> Colonies of successfully transformed TGI and DH5α were picked and thrown in beakers with LB + CM + AMP, and incubated at 37 °C and 220 RPM shaking. </p> | ||
+ | <p>Cells containing the RRvT and mRFP biobrick were incubated in their respectful beakers with LB + CM at 37 °C and 220 RPM shaking. These were incubated overnight. </p> | ||
+ | </span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Oct | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 16 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Biobrick measurement</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <p><b>Goal:</b></p> | ||
+ | <ul> | ||
+ | <li>Measure fluorescence of the RRvT and mRFP1 biobrick.</li> | ||
+ | </ul> | ||
+ | |||
+ | <p><b>Procedure:</b></p> | ||
+ | |||
+ | |||
+ | <p>Cultures of RRvT and mRFP1 were diluted until OD=0.1. Then absorbance and fluorescence were measured by the TECAN plate reader. They were placed in wells in the following order: | ||
+ | |||
+ | <table style="border-collapse:collapse;border-spacing:0" class="tg"><tr><th style="font-family:Arial, sans-serif;font-size:14px;font-weight:normal;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;background-color:#96fffb;text-align:left"></th><th style="font-family:Arial, sans-serif;font-size:14px;font-weight:normal;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;background-color:#96fffb;text-align:left">1</th><th style="font-family:Arial, sans-serif;font-size:14px;font-weight:normal;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;background-color:#96fffb;text-align:left">2</th><th style="font-family:Arial, sans-serif;font-size:14px;font-weight:normal;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;background-color:#96fffb;text-align:left;vertical-align:top">3</th><th style="font-family:Arial, sans-serif;font-size:14px;font-weight:normal;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;background-color:#96fffb;text-align:left;vertical-align:top">4</th><th style="font-family:Arial, sans-serif;font-size:14px;font-weight:normal;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;background-color:#96fffb;text-align:left;vertical-align:top">5</th><th style="font-family:Arial, sans-serif;font-size:14px;font-weight:normal;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;background-color:#96fffb;text-align:left;vertical-align:top">6</th><th style="font-family:Arial, sans-serif;font-size:14px;font-weight:normal;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;background-color:#96fffb;text-align:left;vertical-align:top">7</th><th style="font-family:Arial, sans-serif;font-size:14px;font-weight:normal;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;background-color:#96fffb;text-align:left;vertical-align:top">8</th><th style="font-family:Arial, sans-serif;font-size:14px;font-weight:normal;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;background-color:#96fffb;text-align:left;vertical-align:top">9</th><th style="font-family:Arial, sans-serif;font-size:14px;font-weight:normal;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;background-color:#96fffb;text-align:left;vertical-align:top">10</th><th style="font-family:Arial, sans-serif;font-size:14px;font-weight:normal;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;background-color:#96fffb;text-align:left;vertical-align:top">11</th><th style="font-family:Arial, sans-serif;font-size:14px;font-weight:normal;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;background-color:#96fffb;text-align:left;vertical-align:top">12</th></tr><tr><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;background-color:#fffc9e;text-align:left">A</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left">RRvT<br>0mM IPTG</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left"></td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top">RRvT <br>0.5 mM IPTG</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top"></td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top">RRvT 1.0 mM IPTG</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top"></td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top">mRFP 0mM IPTG</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top"></td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top">mRFP 0.5 mM IPTG</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top"></td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top">mRFP 1.0 mM IPTG</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top">LB-media</td></tr><tr><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;background-color:#fffc9e;text-align:left">B</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left">RRvT<br>0mM IPTG</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left"></td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top">RRvT 0.5 mM IPTG</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top"></td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top">RRvT <br>1.0 mM IPTG</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top"></td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top">mRFP 0mM IPTG</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top"></td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top">mRFP 0.5 mM IPTG</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top"></td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top">mRFP 1.0 mM IPTG</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top">LB-media</td></tr><tr><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;background-color:#fffc9e;text-align:left">C</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left">RRvT 0mM IPTG</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left"></td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top">RRvT <br>0.5 mM IPTG</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top"></td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top">RRvT <br>1.0 mM IPTG</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top"></td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top">mRFP 0mM IPTG</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top"></td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top">mRFP 0.5 mM IPTG</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top"></td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top">mRFP 1.0 mM IPTG</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top">LB-media</td></tr><tr><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;background-color:#fffc9e;text-align:left">D</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left">RRvT 0mM IPTG</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left"></td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top">RRvT <br>0.5 mM IPTG</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top"></td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top">RRvT <br>1.0 mM IPTG</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top"></td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top">mRFP 0mM IPTG</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top"></td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top">mRFP 0.5 mM IPTG</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top"></td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top">mRFP 1.0 mM IPTG</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top">LB-media</td></tr><tr><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;background-color:#fffc9e;text-align:left">E</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left">RRvT 0mM IPTG</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left"></td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top">RRvT <br>0.5 mM IPTG</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top"></td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top">RRvT <br>1.0 mM IPTG</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top"></td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top">mRFP 0mM IPTG</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top"></td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top">mRFP 0.5 mM IPTG</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top"></td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top">mRFP 1.0 mM IPTG</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top"></td></tr><tr><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;background-color:#fffc9e;text-align:left">F</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left">RRvT <br>0mM IPTG</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left"></td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top">RRvT <br>0.5 mM IPTG</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top"></td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top">RRvT <br>1.0 mM IPTG</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top"></td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top">mRFP 0mM IPTG</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top"></td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top">mRFP 0.5 mM IPTG</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top"></td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top">mRFP 1.0 mM IPTG</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top"></td></tr><tr><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;background-color:#fffc9e;text-align:left">G</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left">RRvT <br>0mM IPTG</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left"></td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top">RRvT <br>0.5 mM IPTG</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top"></td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top">RRvT <br>1.0 mM IPTG</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top"></td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top">mRFP 0mM IPTG</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top"></td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top">mRFP 0.5 mM IPTG</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top"></td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top">mRFP 1.0 mM IPTG</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top"></td></tr><tr><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;background-color:#fffc9e;text-align:left">H</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left">RRvT <br>0mM IPTG</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left"></td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top">RRvT <br>0.5 mM IPTG</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top"></td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top">RRvT <br>1.0 mM IPTG</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top"></td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top">mRFP 0mM IPTG</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top"></td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top">mRFP 0.5 mM IPTG</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top"></td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top">mRFP 1.0 mM IPTG</td><td style="font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:inherit;text-align:left;vertical-align:top"></td></tr></table> | ||
+ | |||
+ | When 0.8 OD600 was reached, IPTG was added in the wells (except the wells for negative control) at a concentration of 0, 0.5 or 1.0 mM according to the table above. </p> | ||
+ | |||
+ | <p><b>Results:</b></p> | ||
+ | <p>The two biobricks showed similar properties when it comes to fluorescence. We found out that it wasn't optimal to use a transparent 96 well plate, and were lucky enough to borrow some black 96 well plates. Decided to repeat the experiment the next day using the black plates. | ||
+ | </span></div> </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Oct | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 17 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>BioBrick measurement and metabolic cell activity measurement.</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <p><b>Goal:</b></p> | ||
+ | |||
+ | <ul> | ||
+ | <li>Measure absorbance and fluoresence for the RRvT and RFP biobricks. </li> | ||
+ | <li>Measure metabolic activity after 0 and 8 hours.</li> | ||
+ | </ul> | ||
+ | |||
+ | <p><b>Procedure:</b></p> | ||
+ | |||
+ | <p> The biobricks (RRvT and RFP) was measured again with the same procedure as yesterday, but with a black 96 well plate. | ||
+ | |||
+ | <p>See Protocols for general media preparation and XTT procedure.</p> | ||
+ | <p>Measurements of OD600 were taken and results presented in the table below.</p> | ||
+ | |||
+ | <style type="text/css"> | ||
+ | .tg {border-collapse:collapse;border-spacing:0;} | ||
+ | .tg td{font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:black;} | ||
+ | .tg th{font-family:Arial, sans-serif;font-size:14px;font-weight:normal;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:black;} | ||
+ | .tg .tg-xldj{border-color:inherit;text-align:left} | ||
+ | </style> | ||
+ | <table class="tg"> | ||
+ | <tr> | ||
+ | <th class="tg-xldj"></th> | ||
+ | <th class="tg-xldj">OD600 (Post 6x dilution)</th> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td class="tg-xldj">LB (0.4% Glucose)</td> | ||
+ | <td class="tg-xldj">0.100 </td> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td class="tg-xldj">LB (0.8% Glucose)</td> | ||
+ | <td class="tg-xldj">0.096 </td> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td class="tg-xldj">LB (0.4% Glucose TET)</td> | ||
+ | <td class="tg-xldj">0.102 </td> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td class="tg-xldj">LB (0.8% Glucose TET)</td> | ||
+ | <td class="tg-xldj">0.100</td> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td class="tg-xldj">M63B1 (0.4% Glucose)</td> | ||
+ | <td class="tg-xldj">0.093</td> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td class="tg-xldj">M63B1 (0.8% Glucose)</td> | ||
+ | <td class="tg-xldj">0.097</td> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td class="tg-xldj">M63B1 (0.4% Glucose, TET)</td> | ||
+ | <td class="tg-xldj">0.109</td> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td class="tg-xldj">M63B1 (0.8% Glucose, TET)</td> | ||
+ | <td class="tg-xldj">0.108</td> | ||
+ | </tr> | ||
+ | </table> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Vitamine B was added to the M63B1 medium before inoculation to the 96 well plate in the following way: | ||
+ | 0.9 ul of stock solution (90 ml, 0.9108 grams) was mixed in a bottle of M63B1 (900 ml).</p> | ||
+ | <p> 0.9 mL MgSO4 and 18 mL glucose were also added to the M63B1 medium.</p> | ||
+ | |||
+ | <p>The media were mixed according to the table beneath.</p> | ||
+ | |||
+ | <style type="text/css"> | ||
+ | .tg {border-collapse:collapse;border-spacing:0;} | ||
+ | .tg td{font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:black;} | ||
+ | .tg th{font-family:Arial, sans-serif;font-size:14px;font-weight:normal;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:black;} | ||
+ | .tg .tg-0lax{text-align:left;vertical-align:top} | ||
+ | </style> | ||
+ | <table class="tg"> | ||
+ | <tr> | ||
+ | <th class="tg-0lax">Media</th> | ||
+ | <th class="tg-0lax">Content</th> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td class="tg-0lax">LB, 0.4 % glucose TET</td> | ||
+ | <td class="tg-0lax">20 mL LB, 20 µL AMP, 20 µL CM, 0.4 mL 20% Glucose, 39.4 µL 0.5 mg/mL TET</td> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td class="tg-0lax">LB, 0.8 % glucose TET</td> | ||
+ | <td class="tg-0lax">20 mL LB, 20 µL AMP, 20 µL CM, 0.8 mL 20% Glucose, 60 µL 0.5 mg/mL TET</td> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td class="tg-0lax">LB, 0.4 % glucose</td> | ||
+ | <td class="tg-0lax">20 mL LB, 20 µL AMP, 20 µL CM, 0.4 mL 20% Glucose</td> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td class="tg-0lax">LB, 0.8 % glucose</td> | ||
+ | <td class="tg-0lax">20 mL LB, 20 µL AMP, 20 µL CM, 0.8 mL 20% Glucose</td> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td class="tg-0lax">M63B1, 0.4 % glucose TET</td> | ||
+ | <td class="tg-0lax">20 mL M63B1, 20 µL AMP, 20 µL CM, 20 µL 1M MgSO4*7H2O, 0.4 mL 20% Glucose, 39.4 0.5 mg/mL µL TET</td> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td class="tg-0lax">M63B1, 0.8 % glucose TET</td> | ||
+ | <td class="tg-0lax">20 mL M63B1, 20 µL AMP, 20 µL CM, 20 µL 1M MgSO4*7H2O, 0.8 mL 20% Glucose, 40 µL 0.5 mg/mL TET</td> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td class="tg-0lax">M63B1, 0.4 % glucose</td> | ||
+ | <td class="tg-0lax">20 mL M63B1, 20 µL AMP, 20 µL CM, 20 µL 1M MgSO4*7H2O, 0.4 mL 20% Glucose</td> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td class="tg-0lax">M63B1, 0.8 % glucose</td> | ||
+ | <td class="tg-0lax">20 mL M63B1, 20 µL AMP, 20 µL CM, 20 µL 1M MgSO4*7H2O, 0.8 mL 20% Glucose</td> | ||
+ | </tr> | ||
+ | </table> | ||
+ | |||
+ | <p> Then, the metabolic activity was measured by following the XTT protocol. </p> | ||
+ | |||
+ | <p><b>Results:</b></p> | ||
+ | <ul> | ||
+ | <li><p> The cells showed no reduced activity because of tetracycline being present. </p></li> | ||
+ | </ul> | ||
+ | |||
+ | |||
+ | </span></div> | ||
+ | </li> | ||
+ | </ul> | ||
+ | <!-------------------------------------- END OF DAYS IN WEEK ----------------------------------------> | ||
+ | |||
+ | </li> | ||
+ | |||
+ | <!------------------------------------------- END OF WEEK ---------------------------------------------> | ||
+ | |||
+ | |||
+ | |||
+ | |||
+ | <!------------------------------------------- END OF NOTEBOOK ---------------------------------------------> | ||
+ | |||
+ | |||
+ | </ul> | ||
Line 2,059: | Line 4,687: | ||
<script type="text/javascript"> | <script type="text/javascript"> | ||
$('.clickable').click(function() { | $('.clickable').click(function() { | ||
− | $('html, body').animate({ scrollTop: $('.container').offset().top- | + | $('html, body').animate({ scrollTop: $('.container').offset().top-100}, 'slow'); |
}); | }); | ||
</script> | </script> |
Latest revision as of 03:40, 18 October 2018
In our lab journal we have thoroughly documented what we have done in the laboratory, what our goals each session has been, how we have worked and results from each session. If you want a closer look on our methods/receipies, take a look at our protocol.
-
Week25
Week 25
-
Jun20
Our first day in the laboratory!
Goal: Incubate the Escherichia coli (E. coli) samples which carry pgRNA and pdCas9 on agar plates separately with antibiotics.
1. LA- medium (1.5%) was made.
2. Two different agar plates were made – one containing ampicillin (AMP) and one containing chloramphenicol (CM).
Incubation of bacteria
Two Escherichia coli (E. coli) samples which carry pgRNA and pdCas9 plasmids respectively, were ordered from Addgene. E.coli carrying the pgRNA plasmid were plated on agar plates with AMP, while E.coli carrying the pdCas9 plasmid were plated on agar plates with CM. Incubation for 24 h at 37℃.
Results:
There was growth and single colonies on all the plates. -
Jun21
Inoculation of E.coli
Goal: Inoculate a colony from each agar plate in LB- medium with antibiotics.
Procedure
One colony of pgRNA- and pdCas9- bacteria were picked and inoculated in LB-media (25 mL) with 25 µL of the associated antibiotic (AMP or CM). The cell cultures were incubated at 37℃ in a shaking incubator at 204 rpm.
-
Jun22
Isolation and verification of pgRNA and pdCas9
Goal: Isolate and verify that the E.coli carry pgRNA and pdCas9.
Plasmid isolation
pgRNA and pdCas9 were isolated from the incubated bacteria prepared yesterday (June 21) by following the miniprep protocol.
Determine plasmid concentration and purity
The concentration of plasmids and the purity of each sample were determined by using Nanodrop.
Restriction digest and plasmid verification
The presence of pgRNA and pdCas9 in the cell cultures were verified after following the restriction digest protocol and separation of the DNA fragments by gel electrophoresis.
Week26Week 26
-
Jun25
Transformation of pgRNA and pdCas9 into competent cells
Goal: Transform pgRNA and pdCas9 into competent cells (E.coli K-12 DH5α).
Procedure:
The extracted pgRNA and pdCas9 plasmid DNA were transformed into E.coli K-12 DH5α cells.
-
Jun26
Transfer successful transformed cells to LB-medium and preparation of standard curves for the InterLab study
Goal:
Inoculate successful transformed competent cells to LB-medium, and prepare the standard curves for InterLab study.
Procedure:
Inoculate colony from agar plates to LB-medium:
A colony from each agar plate was selected and inoculated to LB- medium with antibiotics. Competent cells with pgRNA were transferred to LB- medium with AMP, while competent cells with pdCas9 were inoculated into LB- medium with CM. The cell cultures were incubated at 37℃ with shaker.
Preparation of 1xPBS solution for the InterLab-study.
Preparation of agar plates with CM, LA- and LB-medium.
Preparation of standard curves for InterLab study:
Calibration 1: OD 600 reference point – LUDOX protocol
A conversion factor to transform absorbance data from plate reader into OD600 was obtained in spectrometer by measuring four replicates of LUDOX CL-X and ddH2O. The data were imported into Excel sheet.
Calibration 2: Particle standard curve – Microsphere protocol
The solution of silica beads provided in the kit from iGEM HQ, was vortexed before dilution with water (96 μL Silica beads in 904 μL dd H2O). A serial dilution of microspheres was obtained by adding 100 μL dd H2O into 4x11 wells (E2, F2, G2, H2…E12, F12, G12, H12) on a 96 well plate. Microsphere stock solution (200 μL) was pipetted into E1 and 100 μL of the solution was transferred to E2 and mixed well before transferring 100 μL to E3. The procedure repeated until 100 μL solution was pipetted into E11, and 100 μL was transferred to liquid waste. The dilution series was repeated for row F, G and H. The absorbance of the samples was measured by a plate reader with shaker at 24℃. The data were exported to Excel sheet. -
Jun27
Isolation of pgRNA and pdCas9 from compentent cells (DH5α) and preparation of stock solution for calibration 3 for InterLab study
Goal:
Isolate plasmids from competent cells (DH5α), and prepare the fluorecein stock solution for InterLab study.
Procedure:
Dilution of cell cultures:
Each cell cultures (successful transformed competent cells from day 5 – 26.06.2018) (2.5 mL) were transferred into fresh LB-medium (22.5 mL) with CM (22.5 μL). The new cultures were incubated for about 2 hours at 37℃ with shaking .
Measurement of the cell density:
The cell density of the new cultures was measured at OD 600, after calibration with water (blank sample).
Plasmid isolation and determination of concentration:
The plasmids were isolated from the competent cell after the protocol of ZR plasmid miniprep kit (see lab journal from day 3 - 22. June. 2018).
The concentration of the plasmids was determined by using Nanodrop.
Restriction digest:
The plasmids from each culture (5 μL) were digested by mixing with 10xbuffer (2 μL), distilled water (12.5 μL) and restriction enzyme BspHI (0.5 μL). The solution was centrifuged down before the samples were incubated over night at 37℃.
-
Jun28
Plasmid verification and storing the cell cultures
Goal:
Verify that the successfully transformed DH5α cells carry pgRNA or pdCas9, and store the cell cultures for future use.
Procedure:
Plasmid verification:
The digested plasmid samples from yesterday’s incubation (lab 6 – 27. June.2018) were separated by gel electrophoresis.
Bacteria glycerol stocks:
The cell cultures made from 27. June were stored in a glycerol stock (500 µL cell culture and 500 µL 50% glycerol) in the freezer at -80℃.
Results:
Plasmid verification:
L, pR1, pR2, pC1 and pC2 are the DNA-fragments from ladder solution, the two samples of pgRNA and pdCas9, respectively. From Figure 1 the two fragments with 1.5 kb and 1.0 kb were found from the fragments of pgRNA after digestion by BspHI. The fragment with 100 bp from the digested pgRNA is not visible on the gel, probably due to masking of the dye colour at the bottom of the gel. Two bands from the digested pdCas9 with 2.7 kb and 4 kb were also detected. By comparing the results og gel elecrophoresis obtained from today's experiment with the results from day 3 (22. June. 2018), one can clearly see that the bands with the expected length from successful transformed competent cells, are much clearer. Hence, this also indicate the samples from the successful transformed DH5α cells are purer, which is also true by comparing the results from Nanodrop (see day 6 - 27. June. 2018, and day 3 - 22. June. 2018). -
Jun29
Insertion of anti-luxS via PCR and fluorescence standard curve for InterLab study
Goal:
Insert anti-luxS in pgRNA plasmid, and generate fluorescence standard curve for the InterLab study.
Procedure:
Insertion of anti-luxS gene and amplification of pgRNA with PCR.
InterLab – Calibration 3
A fluorescence standard curve was generated from the data obtained after measuring the fluorescence of the serial dilution of fluorescein.
The fluorescence was measured with the following settings:
Temperature: 24℃
Gain (manual): 56
Wave length [nm] Band width [nm] Excitation 494 4 Emission 525 20
Results:
InterLab – Calibration 3:
Figure 1 shows the florescence standard curve in the concentration interval [0, 2.5 μM], with a R2 value of 0,9956. The model of the fluorescence standard curve is:
Week27Week 27
-
Jul2
Separation, isolation and transformation of linear DNA (pgRNA with anti-luxS)
Goal:
- Separate the PCR product from circular DNA
- Isolate the linear DNA (pgRNA with anti-luxS from the gel
- Transform the linear DNA into competent cells
- InterLab study - transformation of plasmids to competent cells
Procedure:
Separation of linear DNA from circular DNA:
The leaner DNA obtained from PCR (from day 8 – 29. June. 2018), was separated from the circular DNA (original plasmids) after running the sample (25 μL) mixed with loading dye (5 μl) on gel electrophoresis (gelGreen) simultaneously with a ladder (1 μL gene ruler + 1 μL loading dye + 4 μL dH2O) for 50 min at 90 V. The sample and the ladder were prepared by the gel electrophoresis protocol.
Gel digestion and DNA isolation:
The agarose was digested and the DNA was isolated from the sample following the gel purification protocol.
Determine the DNA concentration and purity:
The concentration and the purity of the isolated DNA was determined by using Nanodrop.
Transformation of PCR product to competent cells: The PCR product (5 μL) was transformed to competent cells after following the transformation protocol.
InterLab – transformation of plasmids to competent cells:
The plasmids listed on the protocol, was transformed into competent cells (DH5α) after the following protocol:
- Thaw the competent cells on ice (10 min), and pre-chill the eppendorf tubes.
- Resuspend the DNA in the wells (provided by iGEM HQ) with dH2O (10 μL).
- Add competent cells (50 μL) to the eppendorf tubes.
- Add resuspended DNA (1 μL) to the Eppendorf tubes.
- Incubate on ice for 25 min
- Heat shock the cells for 45 s at 42℃ in water bath
- Incubate on ice for 5 min.
- Add LB-medium (950μL) to the tubes
- Incubate for 1h at 37℃ with shacker
- Pipette each sample (100 μL) to agar plate with CM
- Centrifuge the samples for 3 min at 6800g, discard supernatant (800 μL) and resuspend the pellet with the remaining supernatant
- Pipette each sample (100 μL) to agar plate with CM
- Incubate overnight at 37℃.
Results:
Separation of linear DNA from circular DNA:
Figure 1 shows the image of the gel where the linearized DNA was separated from the circular DNA. The linearized DNA is approximately 2 kb. The linearized DNA fragment was then cut out from the gel and stored in eppendorf tube.
Note! Due to UV-light exposure, the DNA may mutate. In this case, this may affect the later steps of our project. The worse scenario, mutation of anti-luxS. Hence our CSRPRi system may not recognize luxS in the bacteria. Biofilm production will not be inhibited…
Determine the DNA concentration and purity:
Table 1 shows the results of the linear pgRNA (2) from PCR (probably with anti-luxS gene).
Table 1: The concentration and the relative purity of the pgRNA (2) from PCR.Concentration [ng/μL] 260 nm/280 nm 260 nm/230 nm 52.8 1.90 0.27
From the 260/230 ratio, the sample has a relatively a small amount of nucleic acids. Probably, it is contaminated by the agarose from the gel electrophoresis. On the other hand, the 260/280 ratio is ok, indicating that the sample contains a relatively larger amount of RNA than DNA. InterLab – transformation of plasmids to competent cells:
No visible colonies were detected on agar plates, except the positive and negative control cells. -
Jul3
Inoculation of successful transformed competent cells and InterLab study
Goal:
- Inoculate colonies of successful transformed competent cells
- InterLab study - transformation of plasmids to competent cells
Procedure:
InterLab – transformation of plasmids to competent cells:
No visible cell colonies were formed on the agar plates that were incubated on day 9 - 02. Junly. 2018. Only the positive and negative control cells formed colonies.
Therefore, the remaining plasmids (6 μL) were transformed to the competent cells and plated on agar based on the same protocol from day 2. Jul. 2018. During the incubation at 37℃ with shaker, the incubation time was extended to 2 h. The cell cultures were centrifuged, and 700 μL supernatant was discarded, and the pellets were resuspended with the remaining supernatant. The cell cultures were then plated on agar plated with CM, and incubated overnight at 37℃.
Inoculation of successful transformed competent cells:
Colonies of successful transformed competent cells with pgRNA (probably containing anti-luxS) were inoculated from the agar plates (from day 9 – 02. July. 2018) to LB-medium with AMP. The cell cultures were incubated with shaker overnight at 37℃.
-
Jul4
Verification of successful inserted anti-luxS in pgRNA
Goal:
- InterLab - transformation of plasmids into competent cells
- Verification of succsesful insertion of anti-luxS in pgRNA(2)
Procedure:
InterLab – Transformation of plasmids to competent cells
There has been a mistake of numbering the plates with plasmids provided by iGEM HQ. Therefore, we did not get any cell colonies from the previous two transformations…
The plasmids (1.5 μL) from the right wells were transformed to competent cells by following the transformation protocol from day – 02. July. 2018, after resuspension of the plasmids in the wells.
Cell density:
The cell cultures with pgRNA(2) (probably with anti-luxS), inoculated from day 10 – 04. July. 2018, were diluted 10 times by following the same dilution procedure from day 6 – 27. June. 2018. The cells were incubated with shaker for 1h before measuring at OD 600.
Plasmid isolation:
The plasmids from the two cell cultures were isolated after the same mini-prep protocol from day 3 – 22. June. 2018. The concentration and the purity of the isolated plasmids were measured by Nanodrop.
Restriction digest and gel elecrophoresis:
Insertion of anti-luxS gene was verified after the protocol of restriction digest and gel electrophoresis (see the protocols from day 3 – 22. June. 2018). The restriction enzyme PstI was chosen, and the expected length of the plasmid fragments are 490 bp and 2094 bp.
Note! PstI has a cut site at the anti-luxS gene in the plasmid.
Bacteria glycerol stock:
Two samples of the diluted cell cultures (made at this morning), were stored in 50% glycerol solution at -80℃ (the same green box with the other successful transformed cells with pgRNA (without anti-luxS) or cells with pdCas9 plasmids).
Results:
InterLab - Transformation:
Colonies were formed on agar plates with CM.
Cell density:
Table 1: Absorbance of the cell cultures with pgRNA(2) after 1 h incubation at 37℃ with shaker.Culture OD 600 pR2 (1) 0.954 pR2 (2) 0.998 Concentration (ng/μL) 260 nm/280 nm 260 nm/230 nm pR2(1) 37.2 2.06 4.29 pR2(2) 123.3 1.77 1.01 -
Jul5
Double transformation and InterLab study - Inoculation
Goal:
- Transform both pdCas9 and pgRNA with anti-luxS into competent cells
- InterLab study - inoculate colonies in LB-medium
Procedure:
Double transformation of pdCas9 and pgRNA with anti-luxS:
Both pdCas9(2) and pgRNA(2) with anti-luxS (isolated from day 11 – 05. July. 2018) were simultaneously transformed into competent cells (DH5α). The amount of added pdCas9(2) (5 μL) and pgRNA(2) with anti-luxS was 5 µL per/plasmid, and it was added to the same tube containing competent cells. The cells were plated on agar with both AMP and CM. A couple of steps were added at the end, and the purpose was to increase the cell concentration plated on agar, and probably increase the possibility of colony formation. The cell culture was therefore centrifuged for 3 minutes at 6800g, and the supernatant discarded. The pellet was then resuspended and cells were plated.
InterLab – Inoculation of colonies
A colony from each agar plate was inoculated in LB-medium (5 mL) with CM (5 μL). The cell cultures were incubated overnight at 37℃ with shaker.
-
Jul6
Inoculation of successful double transformed cells, interLab study - Cell measurement
Goal:
- Inoculate successful double transformed cells (probably carrying pdCas9 and pgRNA with anti-luxS)
- InterLab study - measure absorbance and the fluorescence of each cell cultures
Procedure:
Inoculation of successful double transformed cells
- A colony from each agar plates with AMP and CM (made from day 13 – 05. July 2018) was picked and inoculated in LB medium (20 mL) with AMP (25 μL) and CM (25 μL).
- The cell cultures were incubated at 37℃ with shaker.
InterLab – Cell measurement
We were not able to measure the cell cultures today, since the TECAN device was under reparation.
Each cell cultures were stored with 50% glycerol (see day 7 – 28. June. 2018) at -80℃.
-
Jul7
Verification of pdCas9 and pgRNA with anti-luxS after double tranformation
Goal:
Verify that both pdCas9 and pgRNA with anti-luxS are tranformed into DH5α cells
Procedure:
Dilution of cell culture:
Each cell cultures, inoculated and incubated from day 13 – 07. July. 2018, were diluted (1mL) with LB medium with antibiotics until the OD 600 reached 1.9.
Plasmid verification:
Plasmid isolation:
The plasmids were isolated from each cell cultures after following the mini-prep plasmid protocol from day 3 – 22. June. 2018. The concentration and the purity of the samples were determined by Nanodrop.
Restriction digest and gel electrophoresis:
The plasmids in each sample were digested with restriction enzymes BamHI-HF and PstI with the following ingredients and amounts:
- 7.1 μL Plasmids
- 0.5 μL PstI
- 0.5 μL BamHI-HF
- 2 μL NEBuffer 1.1
- 10.4 μL ddH2O
Note! NEBbuffer 1.1 was chosen instead of Cut smart since the activity of PstI in Cut smart was 50%.
The activity of the enzymes in NEBbuffer 1.1:
BamHI-HF: 100%
PstI:75%
After the plasmids have been degraded by restriction enzymes, the fragments were separated by gel electrophoresis.
Results:
Plasmid verification:
Plasmid isolation:
Sample Concentration [ng/μL] 260 nm/280 nm 260 nm/230 nm 1 219.9 2.01 1.82 2 35.3 2.03 3.86
The bands on the gel, corresponded with the expected fragments (6705bp, 2094bp, 465bp, 25bp) from digestion of the plasmids by PstI and BamHI-HF. Therefore, we concluded that both of pdCas9 and pgRNA with anti-luxS have successfully been transformed into DH5α cells.
Week28Week 28
-
Jul9
No lab
-
Jul10
No lab
-
Jul11
No lab
-
Jul12
InterLab Study: Revive bacteria glycerol stock
Goal:
InterLab Study: Revive bacteria glycerol stock
Procedure:
The frozen bacteria glycerol stock made from 6th of July were thawed on ice. Each culture were inoculated in LB medium with CM (5 mL), and incubated over night at 37°C.
-
Jul13
InterLab Study: CFU/mL/OD calculations
Goal:
Count colony forming units on plates spread the day before.
Procedure:
Counted CFU on all 36 plates incubated 13. July.
Results:
The colonies on agar plates, from yesterday’s incubation, were counted and registered:CFU Dilution 3 Dilution 4 Dilution 5 1.1 195 6 1 1.2 185 2 0 1.3 203 15 3 2.1 222 19 2 2.2 38 22 1 2.4? 52 15 1 3.1 113 56 3 3.2 112 12 2 3.3 127 25 2 4.1 79 4 0 4.2 75 10 1 4.3 107 3 1 -
Jul14
InterLab – CFU/mL/OD calculation
Goal:
Counting colonies on each agar plate, and calculate CFU/mL in starting samples with an OD600 = 0.1.
Procedure:
The colonies on the agar plates, prepared from yesterday’s incubation, were counted and registered.
Results:
Table 1: The average values of counted colonies from two cultures of positive and negative controls with different final dilution factor (dilution 1 = 8x104, dilution 2 = 8x105, dilution 3 = 8x106).Positive control Negative control Culture 1, dilution 1 194.3 117.3 Culture 1, dilution 2 7.7 31.0 Culture 1, dilution 3 1.3 2.3 Culture 2, dilution 1 104.0 87.0 Culture 2, dilution 2 18.7 5.7 Culture 2, dilution 3 1.3 0.7
Week29Week 29
-
Jul16
Transformation of the RFP-biobrick (test)
Goal:
Transform the RFP-biobrick (BBa_J04450) into competent DH5α-cells.
Procedure :
Before doing the transformation the biobrick was resuspended with 10 µL dH2O in the plate (position 23O, plate 7). The cells with and without the biobrick (negative control) were both incubated and plated after the transformation. The negative control was plated on LA-petri dishes while the transformed cells was plated on LA-petri dishes with CM.
Results:
There was only one colony on each plate -
Jul17
Colony picking biobrick (test) and transformation
Goal :
1. Get colonies of the transformed DH5α (biobrick) 2. Get colonies on the negative control plate
Procedure:
1. Due to the lack of colonies on the negative control plates, new plates was streaked.
2. New LA-plates without antibiotics were made.
3. Colonypicking the two colonies from the plates with the transformed bacteria in to liquid medium.
4. The transformation of bacteria with the biobrick plasmid was redone on four plates because of the lack of growth on the plates (see 16.07.18).
Results:
There were more colonies on the four new plates, and they were light red as well (About 20 colonies). The new negative control plates had colonies as well.
-
Jul18
RFP biobrick fluorescens measurement (test)
Goal:
1. To get a descriptive curve for the rise in fluorescens (transformed DH5α)
2. Find out how often the measurements need to be done.
Procedure:
The second batch of plates from transformation and the negative control:
1. Colonypicking and exchange to liquid medium
Measurements of the first batch (Tecan):
1. Measured the OD of the blank (LB and CM), and measured the OD of the two cultures.
2. For the next measurements we diluted the cultures by 1:100 in separate tubes.
3. Incubation of the tubes
4. The first measurement was done in the Tecan, and repeated for every 30 minutes and then 1 hour (because of minor changes in values)
5. The measurements was set overnight as well using the following script: FluorescenceLong. The data was set to 588 nm absorbance, 584 nm excitation, 607 nm emission, 37°C, 40 gain, 150 kinetic cycles, 300s shaking (orbital 3 mm amplitude).
Results:
The second batch from transformation has turned red. From the measurements of the test batch we have an idea of the increase in fluorescence intensity and the change in absorbance over time. This can be used to determine the timing of the second batch with the negative control as well.
-
Jul19
Biobrick: Preparations, Fluoresence microscopy
Goal:
Prepare for measurements tomorrow.
Learn about fluorescence microscopy
Procedure:
Preparations:
Made LA-petri dishes with CM. Diluted cultures of the biobrick Bba_J04450 and negative control and incubated them at 37°C overnight.
Demonstration and training in fluorescence microscopy:
Astrid Bjørkøy showed us how to use the fluorescence microscope, and we tried it out by taking photos of cultures of the Bba_J04450 biobrick. She also told us how to count cells by adjusting a photo's threshold and calculate based on image size.
Results:
The biobrick Bba_J004450 was very bright. We used excitation 561 nm and emission ca 625-680 nm as the biobrick was too bright at emission 607 nm. Consider using another laser further away from excitation point (584 nm) for the real photos of the biobrick, and the improved biobrick.
-
Jul20
Biobrick: Red Fluorescent Protein measurement (FAILED)
Goal:
Measure the expression of the Bba_J04450 biobrick in transformed dH5α cells. This is done by measuring fluorescence.
Procedure:
1. Incubated dH5α, J04450 transformed cells were dilluted 1:100 with LB
2. 200 µL, 5 replicates of LB, LB with Chloramphenicol and 5 dH5α dillutions made from different batches were applied to a 96 well plate
3. Tecan plate reader was used to measure absorbance at 588 nm and fluorescence at excitation 584 nm and emission 607 nm with the following parameters:
- Temperature: 37,0°C, varying from 36,5°C to 37,5°C
- Kinetic cycles: 750
- Gain: 40
- Z position: 18055 µM
- Shaking: 300 s
- Orbital shaking amplitude: 3 mm
Results:
The wells dried out, presumably due to us choosing not to use a lid on the plate, and the measurements were therefore aborted by the machine.
Week30Week 30
-
Jul23
Make super competent cells of the TG1
Goal:
Make supercompetent cells of the E.coli - TG1 strain
Procedure:
DAY 1:
- Made Psi media, transformation buffer 1 and transformation buffer 2.
- Made an E.coli TG1 culture in a small flask with 10 mL Psi- medium. Inoculated culture at the end of the day and left the flask for incubating while shaking and at 37°C overnight.
-
Jul24
Make supercompetent cells of the TG1, day 2
Goal:
Make supercompetent cells of the TG1
procedure:
This was done from an overnight culture of TG1-cells, see protocol.
Results:
There was no growth on the plates with CM and AMP after the transformation (25. July. 2018), so the conclusion was that the cells were not supercompetent. The protocol was then updated and optimized for another trial.
-
Jul25
Miniprep and transformation of TG1-cells
Goal:
1. Transformation of TG1-cells with DNA that includes pdCas9 and pgRNA with antiluxS-gene.
2. Make LA-plates with both CM and AMP antibiotics
Procedure:
pgRNA with antiluxS and pdCas9 has already been transformed into E.coli DH5α. The plasmids were isolated and extracted by the miniprep protocol. Transformation of the TG1-cells with the extracted plasmids was done, and the bacteria were incubated.
Results: No bacterial growth has been observed. -
Jul26
Preparations for biofilm measurements
Goal:
1. Make media for the biofilm measurements (LB and M63B1)
2. Prepare TG1, TG2 buffers and Psi medium for supercompetent cells.
Procedure:
1. Made three versions of the two media with pH-values at 4.5, 7.2 and 9.5. The media was then autoclaved and sugar will be added before use of the media.
2. Made TG1, TG2 buffers and Psi medium.
-
Jul27
Make supercompetent cells of TG1, second attempt
Goal:
Make supercompetent cells of TG1 by following an improved protocol.
Procedure:
See Protocols for details.
Results:
Transformation successful
Week31Week 31
-
Jul30
Transformation of TG1-cells and flow cytometry test
Goal:
1. Transformation of TG1-cells with DNA that includes pdCas9 and pgRNA with antiluxS-gene.
2. Learn and conduct a flow cytometry test of the E.Coli DH5a that contains the Bba_J04450-biobrick and a negative control. The goal was also to optimize a protocol for the biobrick measurements.
Procedure:
pgRNA with antiluxS and pdCas9 has already been transformed into E.coli DH5α. The plasmids were isolated and extracted by the miniprep protocol, and the cells transformed and incubated. For the transformation, 5 µL of the miniprepped plasmids were used instead of 2 µL.
Results:
Noticeable bacterial growth was observed on all plates, with no apparent contamination.
-
Jul31
TG1 colonypicking
Goal:
1. Make cultures out of plates made on the 30th of July, prepare for test digest.
2. Make DH5α cultures for later use in biobrick measurements.
Procedure:
Colonypicking into five beakers with 25 mL LB, 25uL Amp and 25 µL CM. Incubation at 37°C, 225 RPM overnight. New LB-media was made. -
Aug1
Miniprep, Nanodrop, Test digest
Miniprep, Nanodrop and Test digest was done.
-
Aug2
Verification of transformation of TG1 and preparation of media for biofilm measurements
Goal:
1. Confirm successful transformation of TG1 with pgRNA and PdCas9 with anti-luxS.
2. Prepare media for biofilm measurements
3. Inoculate TG1 in newly made media
Procedure:
Verification of the plasmids was done by miniprep, nanodrop, test digest and gel electrophoresis. Different amounts of glucose was added to the respective media.
-
Aug3
Measure OD + change medium
OD600 was measured and medium changed.
Week32Week 32
-
Aug6
E.Coli TG1 biofilm measurement
The two E.Coli TG1 96-well plates made yesterday (06.08.2018) underwent the Crystal Violet Assay protocol (see Protocols), and the biofilm produced was measured by measuring absorbance at 590 nm with Tecan Infinite 200 Pro plate reader.
-
Aug7
Incubate DH5α and TG1 in chosen media for biofilm measurements.
Goal:
- Incubate DH5α and TG1 (with pgRNA and pdCas) in selected media (LB and M63B1, pH 7.2, 0.4%/0.8% Glucose) - Make Tetracycline stock solution (5.0 mg/ml)
Procedure:
Incubated the frozen DH5α-stocks in LB (with CM and AMP) for a few hours. Inoculated into the chosen media in eppendorf tubes. Incubated TG1 into the chosen media in eppendorf tubes overnight. Made 5mg/mL Tetracyclin-solution (inducer). Note: light sensitive.
Protocol:
- Tetracyclin-HCl(powder): 54 mg
- Ethanol: 7 mL
- dH2O: 3 mL
After being incubated for some time tetracyclin solution was added to the eppendorf tubes do induce the transcription of Cas9, and the culture tubes were further incubated. -
Aug8
Incubation of cell cultures for biofilm assay and preparation of M63B1 medium
Goal :
1. Incubate cell cultures on 96-well plates for biofilm assay
2. Make M63B1 medium
Procedure :
Preparation for biofilm assay:
1. Overnight cultures (with TET) was diluted until OD600 = 0.1
2. Each diluted culture (100μL) was added on 96-well plate and incubated for 4 h at 37℃
3. After 4 h incubation, the non-adhered cells were removed by washing the wells with physiological saline and the supernatant was discarded.
4. New medium (100 μL) was added to each well and the plate was incubated for 24 h at 37℃.
Note! The media that were added to the wells right before 24 h incubation did not contain TET
M63B1 medium:
M63B1 medium was made after following the protocol from 26. July. 2018
-
Aug9
Preparation of media with TET, and incubation of cell cultures on 96-well plate for biofilm assay
Goal :
1. Preparation of media with tetracycline (2 μM)
2. Incubate cell cultures with and without tetracycline (TET) on a 96-well plate for the 24 h biofilm assay.
3. Measure the absorbance of CV- assay with and without TET, made from yesterdays’ incubation.
4. Prepare TG1 and dH5α cell cultures in growth medium (LB or M631B) with or without TET (2 μM).
Procedure :
Preparation of media with TET (2 μM):
1. Tetracycline (TET) (50 μL, 0.5 mg/mL) was added to a 25mL LB medium with 0.4% glucose, AMP and CM. The same amount of tetracycline was added to LB medium with 0.8% glucose, AMP and CM
2. For the final M63B1 medium (0.5 L) with MgSO4*7H2O, AMP and CM and 0.4% or 0.8% glucose, TET (1mL, 0.5 mg/mL) was added.
Preparation of 96-wells plate for 24h biofilm assay:
1. Overnight cultures were diluted with or without TET (2 μM) containing media (LB or M63B1) until a target OD600 = 0.1.
2. Each diluted culture (100 μL) were incubated on a 96-wells plate for 20 h at 37℃.
Absorbance measurement of CV-assay:
1. The supernatant was discarded from a 24h incubation of cell cultures on a 96-wells plate (prepared from 08. August. 2018) and rinsed with PS (100μL).
2. The biofilm was fixed by adding methanol (100 μL, 99%) and waited for 15min. The supernatant was discarded, and the plate was airdried.
3. CV-solution (100 μL, 0.1%) was added to each well and coloured the biofilm for 20 min. The excess CV was washed away with dH2O 4. Acetic acid (150 μL, 33%) was added to the each well.
5. The absorbance was measured at Abs 590 nm
-
Aug10
Preparation of overnight cultures for biofilm assay, and storage of TG1 cells with pgRNA and pdCas9
Goal :
1. Prepare overnight cultures in LB (0.4% or 0.8% glucose, with AMP and CM) or M63B1 (0.4% or 0.8% glucose, with AMP and CM) with or without TET.
2. Wash the 96-well plate (after 20 h adhesion - prepared from 09.08.2018) with physiological saline, add new media and incubate the plate.
3. Make bacteria glycerol stocks of TG1 cells with pgRNA and pdCas9.
Procedure :
Preparation of overnight culture:
TG1 and dH5α were incubated in eppendorf tubes with different media (LB or M63B1 with glucose (0.4% or 0.8%), AMP and CM) with or without TET (2 μM) for overnight at 37℃ with shaking.
Preparation for biofilm assay:
1. After 20 h adhesion (plate prepared from 09. August. 2018), the non-adhered cells were removed by washing the wells with physiological saline (PS) and the supernatant was discarded.
2. New medium (100 μL) was added to each well and the plate was incubated for 24 h at 37℃.
Bacteria glycerol stock preparation:
TG1 cells with pgRNA and pdCas9 (500 μL) was stored with glycerol (500 μL, 50%) at -80℃.
-
Aug11
Preparation of overnight cultures for biofilm assay
Goal :
Prepare 96-well for cell adhesion and CV-assay
Procedure :
The OD of some of the overnight cultures was not optimal for continuing the procedure of CV assay. New cell cultures were made.
96-well plates for 24 h, 48 h and 72 h incubation were made. However, since the cell cultures could not be diluted to OD = 0.1, the results of the CV assay will not be comparable. -
Aug12
Incubation of cell cultures for biofilm assay
Goal :
Preparation for cell adhesion on 96-well plates for 24 h, 48 h and 72 h incubation.
Procedure :
1. The overnight cultures were resuspended, before dilution until a target OD = 0.1.
2. The diluted cell cultures were resuspended and added on 96-well plates and incubated for 4 h at 37℃.
3. After 4 h incubation, the wells were washed with physiological saline (100 μL) and the supernatant was discarded.
4. New media (100 μL) were added to the plates, and the plates were incubated at 37℃.
Results :
Week33Week 33
-
Aug13
Biofilm measurements after 24hrs
Procedure: Crystal violet assay
Changed medium in the plate for 48 and 72 hrs.
Results:
Results did not show any clear trend. Excel sheet attached.
Wells with only medium, not cells, showed too high absorbance measurements, probably because of contamination of the mediums. Decided to autoclave all the mediums again. Will take measurements at 48 hrs, but not at 72 hrs. -
Aug14
Biofilm measurement after 48 hrs
Goal:
- Measure biofilm after 48 hrs.
- Prepare RRVT-Biobrick and biobrick backbone
- Ligate and transform RRvT- biobrick and biobrick backbone into DH5alpha cells.
1. Performed the Crystal Violet Assay procedure for the plate designated for 48hrs and for the plate that initially was designated for 72 hrs measurement. -
Aug15
Biobrick ligation and transformation
Goal:Biobrick ligation and transformation
- Ligate plasmid backbone and RRvT-plasmid and transform into cells.
- Due to the lack of colonies from yesterdays transformation the ligation of plasmid backbone and RRvT-plasmid and transformation into E.Coli Dh5α cells was redone.
- Preparations of plasmid backbone and RRvT-biobrick:
Made enzyme master mix for plasmid backbone by adding 5μL NEB buffer 2, 0.5 μL EcoRI-HF, 0.5 μL PstI, 0.5 μL BSA and 18.5 μL dH2O to an Eppendorf tube.
Made enzyme master mix for RRvT-biobrick by adding 5μL NEB buffer 2, 0.5μL EcoRI-HF, 0.5 μL PstI and 19 μL dH2O to an Eppendorf tube. Incubated mix for 20 min at 50℃.
Digested Plasmid backbone by adding 4 μL linearized backbone (25 ng/μL for 100 ng) and 4 μL of enzyme master mix for plasmid backbone.
Digested RRvT-biobrick by adding 4 μL of the biobrick and 4 μL of the enzyme master mix for RRvT-biobrick. Digested both reactions at 37℃ for 90 min and did heat kill at 80℃ for 20 min.
- Ligation:
Added 2 μL of digested plasmid backbone.
Added 2 μL of digested RRvT-biobrick.
Added 1 μL T4 DNA ligase buffer.
Added 0.5 μL of T4 DNA ligase.
Added water to 10 μL.
Ligated at 16℃ for30min. Did heat kill at 80℃ for 20 min.
Transformed E.Coli Dh5α cells with 1-2 μL of product following the protocol for transformation.
Inoculated .. plates and let them incubate at 37℃ to the next day.
Aug16Preparation for biobrick (RRvT) measurement and biofilm assay
Goal:
- Inoculate successful transformed cells into LB medium with CM.
- Revive TG1 and DH5α cells in LB medium with AMP, CM and 0% glucose.
Preparation for biobrick (RRvT) measurement:
Successful transformed cell colonies from yesterday's incubation were inoculated into LB - medium with CM and incubated at 37°C with shaking.
Preparation for cell cultures for biofilm assay:
TG1 and DH5α cells with pgRNA and pdCas9 were revived in LB medium with AMP, CM and 0% glucose. The cell cultures were incubated at 37°C with shaking.
Aug17Preparation for biofilm assay
Goal:
- Dilute the overnight cultures for biofilm assay.
- Do Crystal Violet assay after 3 h, 5 h and 8 h of incubation of a 96-well plate.
Procedure:The media for biofilm assay were made by adding the following ingredients:
- LB 0.4% glucose, TET: 10 mL LB, 10µL AMP, 10µL CM, 0.2 mL 20% Glucose, 19.7µL 0.5mg/mL TET
- LB 0.8% glucose, TET: 10 mL LB, 10µL AMP, 10µL CM, 0.4 mL 20% Glucose, 20µL 0.5mg/mL TET
- LB 0.4% glucose: 10 mL LB, 10µL AMP, 10µL CM, 0.2 mL 20% Glucose
- LB 0.8% glucose: 10 mL LB, 10µL AMP, 10µL CM, 0.4 mL 20% Glucose
- M63B1 0.4% glucose, TET: 10 mL M63B1, 10µL AMP, 10µL CM, 10 µL 1M MgSO4*7H2O, 0.2 mL 20% Glucose, 19.7 µL TET
- M63B1 0.8% glucose, TET: 10 mL M63B1, 10µL AMP, 10µL CM, 10 µL 1M MgSO4*7H2O, 0.4 mL 20% Glucose, 20 µL TET
- M63B1 0.4% glucose: 10 mL M63B1, 10µL AMP, 10µL CM, 10 µL 1M MgSO4*7H2O, 0.2 mL 20% Glucose
- M63B1 0.8% glucose: 10 mL M63B1, 10µL AMP, 10µL CM, 10 µL 1M MgSO4*7H2O, 0.4 mL 20% Glucose
Biofilm assay:
- Pipette 3-4 mL overnight cultures to sterile tubes (total 16 tubes).
- Centrifuge the cultures for 10 min at 2000 rpm at 9°C.
- Remove the supernatant.
- Add 3-4 mL media (LB/ M63B1, with 0.4%/ 0.8% glucose, with/ without TET) to 2 tubes each.
- Resuspend/ vortex the cultures, and measure OD 600.
- Dilute the cultures until target OD 600 = 0.1 and store the cells on ice until they are added to the wells.
- Resuspend/ vortex the cultures, add 100 µL culture to each well on the plate.
- Seal the top of the plate with parafilm, and incubate the plate at 37°C.
- Do CV assay after 3 h, 5 h, 8 h, 24 h and 48 h incubation.
Week34Week 34
-
Aug20
Preparation for 3h, 5h, 8h, 24h, 30h CV and Bactiter-Glo Assay.
Goal:Redo CV assay from 17th August to check the validity of previous results.
Perform Bactiter-Glo Assay parallell to CV Assay (3h, 5h, 8h, 24h, 30h) to examine the amount of living cells in biofilm.
Procedure:Crystal Violet Assay: Same procedure as from 17.08.2018.
Bactiter-Glo Assay
-
Aug21
No lab
No lab. -
Aug22
No lab
No lab. -
Aug23
No lab
No lab. -
Aug24
No lab
No lab.
Week35Week 35
-
Aug27
No lab
No lab. -
Aug28
No lab
No lab. -
Aug29
No lab
No lab. -
Aug30
No lab
No lab. -
Aug31
No lab
No lab.
Week36Week 36
-
Sept3
No lab
No lab. -
Sept4
No lab
No lab. -
Sept5
Introduction of site directed mutagenesis on pdCas9 and make medium for V. natrigens
Goal:Make LB medium and 10x v2 salts for Vibrio natrigens
Amplify and introduce site directed mutagenesis in pdCas9
Procedure:LB - medium
10x v2 salts:
Make the salt solutions after the following recipe:- 11.935 g NaCl (204 mM)
- 0.3134 g KCl (4.2 mM)
- 4.710 g MgCl2*6H2O (23.14 mM)
- 1 L ddH2O
Site directed mutagenesis:
Forward and reverse primers for site directed mutagenesis were designed and ordered from Sigma Aldrich. Introduce site directed mutagenesis in pgCas9 via PCR after following the protocol from 29. June. 2018. The first PCR was not successful. The primer annealing temperature was changed, and the elongation time as well. -
Sept6
Introduce site directed mutagenesis in pdCas9 and amplify RRvT and pSB1C3e
Goal: Introduce site directed mutagenesis in pdCas9 Amplify RRvT and pSB1C3 via PCR
Procedure: Site directed mutagenesis in dCas9: pdCas9 was amplified via gradient PCR, where the annealing temperatures were 57.3 ℃, 59.3 ℃, 61.1 ℃ and 64.1℃ with an elongation time for 5 min. The samples were stored in the fridge after the PCR was finished. Amplification of RRvT and pSB1C3: RRvT and pSB1C3 fragments were amplified by running the samples (6 µL FW primer, 6 µL REV primer, 1 µL template, 12.5 µL Takara Hi-Fi PCR premix) on PCR with the following settings: annealing temperature 37 ℃ for 10 s, elongation temperature 72 ℃ for 1 min. The samples were stored in the fridge after the PCR was finished.
-
Sept7
Gel purification of PCR products (pdCas9, RRvT and pSB1C3), incubate V. natriegens
Goal:Separate the PCR products of RRvT and pSB1C3 on gel, and miniprep the desired fragments on the gel. Incubate Vibrio natreigens (V. natriegens). Do another round of site directed mutagenesis on pdCas9 via PCR.
Procedure: Gel purification of RRvT and pSB1C3 on gel:5 μL loading dye was added to the PCR products (25.5 μL). The PCR products were separated on Gel green (90 V, 40 min). The desired fragments were cut out from the gel and collected in eppendorf tubes Gel digestion and DNA isolation of RRvT and fragment of pSB1C3: The PCR products with the desired length on the gel was isolated by following after the same protocol from 02.07.2018.
Inoculation and incubation of V. natriegens:Sample of V. natriegens sent by the iGEM team from Marburg, was inoculated and incubated by following after the protocol provided by the team.
Introduce site directed mutagenesis in pdCas9:PCR mix with pdCas9 was prepared after following the same protocol from 29.06.2018. Two samples were set on two different programs: 3 step PCR: DNA denaturation temperature at 98℃, primer annealing temperature at 55 ℃ for 10 s, elongation temperature at 72 ℃ for 7 min. 2 step PCR: same conditions as 3 step PCR without the primer annealing step.
-
Sept8
Purification of RRvT, separation of PCR product of pdCas9 and measurement of growth curve of V. natriegens (failed)
Goal:- Measure the growth curve of V. natrigens
- Gel purification of RRvT
- Separte the PCR products of pdCas9 on gel
Growth curve of V. natrigens:
The experiment failed due to dilution in the flasks and not in the cuvettes
Gel purification of RRvT:
The PCR product of RRvT was purified on gel, and the DNA was isolated after following the same protocol from 02.07.2018.
Gel separation of pdCas9 PCR product:
The PCR products of pdCas9 were separated on both gel red and gel green for imaging and for isolation of the desired fragments by following the same protocol from 02.07.2018.
See results page for results
. -
Sept9
Amplification of RRvT and introduce SDM in pdCas9
Goal:
Amplify RRvT and introduce SDM in pdCas9 via PCR
Procedure:
RRvT and introduction of pdCas9 was necessary since the concentration of the products isolated from gel on 08.09.2018 were too low.
Amplification of RRvT:
RRvT was amplified via PCR with an annealing temperature 55 ℃ for 10 s and elongation temperature at 72 ℃ for 1 min.
Introduce SDM in pdCas9:
Site directed mutagenesis was introduced via PCR with an annealing temperature at 55 ℃ for 10 s and elongation temperature 72 ℃ for 7 min.
The products were stored in the fridge.
Week37Week 37
-
Sept10
Gibson assembly of RRvT and backbon and transformation of SDM pdCas9 and assembled RRvT into competent cells
Goal:
Gel purification of PCR products Gel digestion and isolation of desired DNA fragments Assemble RRvT and pSB1C3 via Gibson assembly Transform pdCas9 and the assembled RRvT into competent cells
Procedure:Gel purification: The PCR products were separated on gel green RRvT: 25.5 µL DNA, 5.05 µL loading dye pdCas9: 25 µL DNA, 5 µL loading dye
Gel digestion and DNA isolation:
The desired fragments (RRvT: approx. 2000 bp, pdCas9: approx. 6000 – 7000 bp) were cut out from the gel. The gel was digested by following after the protocol from 02.07.18.
Transformation of SDM pdCas9 into competent cells:
6 µL DNA was transformed into competent cells by following after the protocol from 25.06.18.
Gibson assembly of RRvT and pSB1C3:
The fragments were assembled together by following the protocol provided from the kit 2 µL RRvT, 8 µL pSB1C3 (0.03 – 0.2 pmol fragments), 10 µL assembly master mix was incubated in a thermocycler at 50C for 15 min. The sample was stored on ice for transformation.
Transformation of assembled RRvT and pSB1C3 into competent cells:
2 µL Gibson assembly product was transformed into competent cells by following after the protocol from 25.06.2018.
-
Sept11
PCR colony screening, isolation and verify successful SDM on pdCas9
Goal:
- PCR colony screening of RRvT gene
- Isolate pdCas9 from cell cultures
- Verify successful SDM on pdCas9 by restriction digest the plasmid
Procedure:
PCR colony screening:
None of the colonies were red/ pink coloured like the colonies with RFP.
PCR colony screening was done to test whether assembly of RRvT and pSB1C3 fragments was successful
PCR mix was prepared after the following protocol: 5 µL Takara Hi-Fi PCR premix, 1 µL ddH2O, 6 µL RRvT FWD primer, 6 µL RRvT REV primer 8 different colonies were chosen and transferred to a new agar plate with CM, before the colony was transferred to a PCR tube with PCR mix. The samples ran on a PCR machine with the same settings from day 28 – 06. 09. 2018.
Plasmid isolation:
pdCas9 with SDM was isolated from three cell replicates by following the protocol from day 3 – 22. 06. 2018.
Restriction digest:
Introduction of SDM in pdCas9 was verified by adding restriction enzyme which originally recognize and cut at a specific site in the plasmid. EcoRI has two restriction sites in pdCas9 before any mutations.
Mix 2 µL DNA (pdCas9 SDM), 2 µL Cut smart buffer, 15.5 µL ddH2O, 0.5 µL EcoRI Hi-Fi Spin down the solutions Incubate overnight at 37 ℃
-
Sept12
Gel separation of digested pdCas9 (SDM) and products from PCR colony screening of RRvT, amplification of pdCas9 fragments for Gibson assembly
Goal:
- Separate the DNA fragments of pdCas9 SDM after restriction digest
- Visualize the products from PCR colony screening on gel
- Amplify the different fragments of pdCas9 for Gibson assembly
- Inoculate colonies with RRvT in LB medium with CM
Procedure:
Gel electrophoresis:
Both pdCas9 fragments obtained from restriction digest, and the products from PCR colony screening of RRvT were separated and visualized on gel by mixing the DNA with loading dye
RRvT: 3 µL DNA, 2 µL dye, 7 µL ddH2O
pdCas9: add 4 µL loading dye to each samples
The DNA fragments were separated on gel red.
Preparation for Gibson assembly of pdCas9:
Segments for Gibson assembly were obtained by amplify the desired fragments with designed primer pairs via PCR.
Primers for Gibson assembly (ordered from Sigma Aldrich), were resuspended with ddH2O and diluted to 1 µ Dilute pdCas9 SDM – 2 µL DNA (PC1), 8 µL ddH2O (to obtain <26 ng/µL) PCR samples (1 µL diluted template (pdCas9 SDM, <26 ng/μL), 6 µL FWD primer, 6 µL REV primer, 12.5 µL Takara HI-FI PCR premix) were incubated in PCR machine with the same settings from day 29 – 07. 09. 2018.
Inoculate cell colonies with RRvT:
Colonies with RRvT was inoculated in LB medium with CM from the agar plate, and the cell cultures were incubated overnight at 37 ℃ with shaking.
Cells were inoculated from the following agar plate. Cells with RFP were revived in LB medium with CM.
-
Sept13
Gel purification, isolation and Gibson assemble the PCR products of pdCas9 fragments, transformation of Gibson assembled product, fluorescence test round of RRvT
Goal:
- Gel purification of the PCR product of pdCas9 fragments
- Gel digestion and isolation of the pdCas9 fragments
- Gibson assemble the pdCas9 fragments
- Transformation of Gibson assembled product into competent cells
- Test round of RRvT by measuring the fluorescence
Procedure:
Gel purification of pdCas9 fragments:
25.5 µL PCR products were mixed with 5.05 µL loading dye, and separated on gel by following after the same procedure from 22.06.2018.
Gel digest and DNA isolation:
After gel electrophoresis, the desired pdCas9 fragments were cut out from the gel. The gel was digested and the DNA fragments were isolated by conducting the same protocol from 02.07.2018.
Gibson assembly of the pdCas9 fragments:
The pdCas9 fragments, isolated from the gel, were assembled after the following protocol
Mix 0.60 µL G1 fragment, 3.49 µL G2 fragment, 3.67 µL G3 fragment, 2.24 µL G4 fragment (the volumes were calculated by our instructor) with 10 µL NEBuilder HiFi DNA Assembly Master mix, and the sample was incubated at 50 ℃ for 1 hour.
The thermocycler was switched off without notice, so the samples stayed at room temperature for an hour before the thermocycler was turned on again…
Transformation of Gibson assembly product:
2 µL Gibson assembly product was transformed into DH5α cells by following after the procedure from 25. 06. 2018
Measure the fluorescence of RRvT:
The overnight cultures with RRvT, RFP and a negative control was diluted until target absorbance Abs600 = 0.1 Four replicates of each culture (100 µL) were added to a 96 well microtiter plate. The Absorbance and the fluorescence were measured with the following settings: 150 cycles with 5 min interval Emission wavelength: 607 nm Exitation wavelength: 584 nm Temperature: 37 ℃ Gain: 22
Results:
Gel purification of pdCas9 fragments for Gibson assembly:
The order of the different fragments from left to right: ladder, G1, G2, G3 and G4. The fragments for Gibson assembly should have the length of 641 bp, 481 bp, 2917 bp and 1468 bp, respectively.
Fluorescence of RRvT:
The values of the fluorescence were too low when the samples were measured with a gain of 22. The liquid in the wells has been evaporated during the measurement.
-
Sept14
Inoculate successful transformed cells, Restreak V. natriegens, amplify gRNA and dCas9 for insertion into LITMUS28i vector
Goal:
- Inoculate successful transformed cells
- Restreak V. natriegens on agar plates
- Amplify gRNA and dCas9 (without mutation) sequence for insertion into LITMUS28i vector
Procedure:
Colony picking:
Successful transformed cells (probably with correct Gibson Assembly product of pdCas9) were inoculated to LB medium with CM. The cell cultures were incubated at 37 ℃ overnight with shaking.
Re-streak Vibrio natriegens on agar plates:
Vibrio natriegens was inoculated and was stoke on LA with v2 salt aseptically. The agar plates were incubated at room temperature.
Amplification of gRNA and dCas9:
The primer pairs of gRNA and dCas9 (ordered from Sigma Aldrich) were diluted with ddH2O, so the concentration of the primers was 100 µM The primers were further diluted until target concentration = 1 µM PCR mix were prepared after the following recipe: pgRNA (0.5 µL, 37.2 ng/ µL), 6 µL FWD primer, 6 µL REV primer, 12.5 µL Takara HiFi PCR premix. pdCas9 (0.5 µL, 53.4 ng/ µL), 6 µL FWD primer, 6 µL REV primer, 12.5 µL Takara HiFi PCR premix. The gRNA sequence was amplified by running the sample with a PCR machine with an annealing temperature 55 ℃ for 10 s, and an elongation temperature 72 ℃ for 1 min. The dCas9 sequence was amplified with an annealing temperature 55 ℃ for 10 s, and an elongation temperature 72 ℃ for 7 min.
-
Sept15
Isolation, digestion of Gibson assembled pdCas9, gel digestion and isolation of gRNA and dCas9 fragments (for insertion into LITMUS28i), inoculation of V. natriegens
Goal:
- Isolate Gibson assembled pdCas9 from overnight cultures
- Test digest the Gibson assembled pdCas9
- Make glycerol stock of cells with Gibson assembled pdCas9 (pdCas9 mutated)
- Gel separate the PCR products of gRNA and dCas9 (for insertion into LITMUS28i vector)
- Gel digest and isolate the gRNA and dCas9 fragments (for insertion into LITMUS28i vector)
- Inoculate natriegens in LB medium with v2 salts
Procedure:
Isolation of Gibson assembled pdCas9:
Overnight cultures were diluted until OD600 ≈9 pdCas9 was isolated from the cells by following after the miniprep protocol from 22.06.2018.
Test digest Gibson assembled pdCas9:
The enzymes EcoRI and XbaI were selected to verify whether the Gibson assembly of pdCas9 was successful or not. For 0.5 µL enzyme, 250 ng DNA is required. The different replicates were prepared by following recipe:
PC1: 5 µL DNA, 2 µL Buffer, 0.5 µL EcoRI, 0.5 µL XbaI, 12 µL ddH2O
PC2: 7 µL DNA, 2 µL Buffer, 0.5 µL EcoRI, 0.5 µL XbaI, 10 µL ddH2O
PC3: 12 µL DNA, 2 µL Buffer, 0.5 µL EcoRI, 0.5 µL XbaI, 5 µL ddH2O
The samples were incubated at 37 ℃ for 3h, before gel separation.
Glycerol stock of Gibson assembled pdCas9 (pdCas9 mutated):
DH5α cells with the Gibson assembled pdCas9 were stored in glycerol stock at -80 ℃ by following after the procedure from day 28.06.2018.
Gel separation of gRNA and dCas9 (not mutated) fragments (for insertion into LITMUS28i vector):
5 µL loading dye was added to each sample. The samples ran on gel green at 90 V for 50 min.
Gel digest and DNA isolation:
The gRNA and dCas9 fragments were isolated from the gel by conducting the same protocol from 02.07.2018.
Incoulation of V. natriegens:
Coloies of V. natriegens were inoculated into LB medium with v2 salt. The cell cultures were incubated at 37 ℃ overnight with shaking.
-
Sept16
Transformation of plasmid with TetR into competent cells, mak glycerol stocks of V. natriegens
Goal:
- Transform the part BBa_R0040 (plasmid with TetR) into competent cells
- Make glycerol stocks of natriegens
Procedure:
Transformation of BBa_R004:
The plasmid was resuspended with 10 µL ddH2O in the well of the plate (provided by iGEM).
10 µL DNA was transformed into DH5α by following after the protocol from 25.06.2018.
Glycerol stock of Vibrio natriegens:
Overnight cultures of V. natriegens was stored in glyrecol stock at -80 ℃.
Week38Week 38
-
Sept17
Amplification of LITMUS28i vector, inoculation of successful transformed cells, revive cells with RRvT and RFP
Goal:
- Amplification of LITMUS28i sequence
- Inoculate successful transformed cells with part BBa_R0040 (plasmid with TetR)
- Revive cells with RRvT and RFP
Procedure:
Amplification of LITMUS28i sequence:
- Designed primers (bought from Sigma Aldrich) were resuspended and diluted to 1 μM.
- The LITMUS28i vector (sponsored by NEB) was diluted to 25 ng/μ
- The diluted primer pair (6 μL of each primer) for LITMUS28i was mixed with the diluted LITMUS28i vector (1 μL) and Takara HiFi PCR premix (12.5 μL).
- The LITMUS 28i sequence was amplified after running in a PCR machine with an annealing temperature of 55 ℃ for 10 s and elongation temperature 72 ℃ for 2 min.
Inoculation of successful transformed cells:
Successful transformed cells with TetR was inoculated into LB medium with CM. The cell culture was incubated overnight at 37 ℃ with shaking.
Revive cells with RRvT and RFP:
Cells stored at -80 ℃ were revived by inoculation into LB medium with CM and incubated overnight at 37 ℃ with shaker.
-
Sept18
Measure the fluorescence of RRvT, separation and isolation of LITMUS28i fragment, Gibson assemble LITMUS28i fragment, dCas9 and gRNA
Goal:
- Measure the fluorescence of RRvT, RFP and TetR
- Separate LITMUS28i sequence on gel
- Gel digest and isolate LITMUS28i segment
- Gibson assemble LITMUS28i sequence, dCas9 and gRNA with anti-luxS
Procedure:
Fluorescence measurement:
- The overnight cell cultures with RRvT, RFP and TetR were diluted to target Abs600 = 0,2.
- 100 μL of each cell cultures were pipetted to a 96 well plate with 4 replicates. The cellcultres were surrounded with LB medium with CM to reduce evaporation of the cell cultures in the wells. The plate was covered with a lid and the plate was sealed with parafilm.
- The absorbance and the fluorescence were measured with a five-minute interval for 150 cycles with a target temperature 37 ℃. The gain was set to 40, wave length of absorbance was set to 588 nm, while the excitation and the emission wavelength were set to 584 nm and 607 nm, respectively.
Gel electrophoresis:
05 μL loading dye was added to the PCR product of LITMUS28i vector (25 μL). The PCR product was separated on gel green, and the desired sequence was cut out from the gel.
Gel digest and DNA isolation:
The desired DNA sequence was isolated by digesting the gel by conducting the same procedure from 02.07.2018.
Gibson assembly:
LITMUS28i, dCas9 and gRNA with anti-luxS were assembled via Gibson assembly. The amount (pmol) required of the different fragments were calculated by the calculator provided by the homepage of NEB, and by following after the protocol of NEBuilder HiFi DNA Assembly
LITMUS28i sequence (2295 bp, 68 ng/μL): 0.8 μL gRNA (538 bp, 43 ng/μL): 0.59 μL dCas9 (5025 bp, 52 ng/ μL): 4.92 μL NEBuilder HiFi DNA assembly master mix: 10 μL ddH2O: 3.69 μL
The sample was incubated at 50 ℃ for an hour. The sample was stored in the fridge
Results:
Fluorescence measurement of RRvT:
The fluorescence of RRvT and RFP was constant over time, and the value of the fluorescence of RRvT and RFP was lower than the fluorescence measured from the medium...
-
Sept19
Measure growth curve of V. natriegens, transformation of Gibson assembled LITMUS28i, test digest mutated pdCas9
Goal:
- Measure the growth curve of V. natriegens
- Transform Gibson assembled LITMUS28i (with unmutated dcas9 and gRNA with anti-luxS) into DH5α cells
- Test digest the mutated pdCas9 with EcoRI and SpeI
Procedure:
Growth curve of V. natriegens:
Overnight cultures were diluted to a target OD600 = 0.05 in 250 mL baffled flasks with a final volume 40 mL. The cell cultures were incubated at 37 ℃ with shaking. The OD600 of each replicate was measured after 10 min incubation for 5 hours.
Transformation of Gibson assembled LITMUS28i vector:
2 μL Gibson assembled LITMUS28i vector that consists unmutated dCas9 and gRNA with anti-luxS was transformed into competent cells after following the same procedure from 25.06.2018.
Restriction digest the mutated pdCas9:
The mutated pdCas9 was cut with EcoRI and SpeI by mixing 5 μL DNA (PC1), 2 μL cut smart buffer, 0.5 μL EcoRI, 0.5 μL SpeI and 12 μL dH2O. The reagent was incubated overnight at 37 ℃.
-
Sept20
Gel separation of digested pdCas9 (mutated), preparation of ligation of mutated dCas9 and iGEM backcone
Goal:
Gel separation of the product from the enzyme digestion of mutated pdCas9
Digestion of mutated pdCas9 and pSB1C3 (preparation for ligation of dCas9 and pSB1C3).
Procedure:
Gel electrophoresis:
The products of enzyme digestion of mutated pdCas9 that has been incubated overnight, were mixed with 3.34 μL loading dye. The DNA segments were separated after running them on gel red at 90 V for 45 min.
Digestion of mutated pdCas9 and pSB1C3:
The DNA were digested after the following recipe
pdCas9: 5 μL DNA (PC1, 50.8 ng/μL), 2 μL 2.1 buffer, 0.5 μL EcoRI, 0.5 μL PstI, 12 μL ddH2O. Linear pSB1C3: 10 μL DNA (linear pSB1C3, 25 ng/μL), 2 μL 2.1 buffer, 0.5 μL EcoRI, 0.5 μL PstI, 7 μL ddH2O.
The samples were incubated at 37 ℃ overnight.
-
Sept21
Gel separation and DNA isolation of digested pSB1C3 and mutated pdCas9, isolation of Gibson assembled LITMUS28i vector from overnight cultures
Goal:
- Gel separate the overnight product of enzymatic digested mutated pdCas9 and linear pSB1C3.
- Gel digestion and isolate the desired DNA fragments of mutated and enzymatic digested pdCas9 and pSB1C3.
- Isolate Gibson assembled LITMUS28i vector (with unmutated dCas9 and gRNA) from overnight cultures
- Test digest the Gibson assembled LITMUS28i vector, and separate on gel
Procedure:
Gel separation of fragments of mutated pdCas9 and linear pSB1C3:
3.34 μL loading dye was added to each sample, and the fragment were separated on gel green at 90 V for 45 min.
The fragments with the desired length (dCas9: approx. 5000bp, backbone: approx. 2000bp) were cut out from the gel and collect in separate tubes.
Gel digestion and DNA isolation:
The DNA fragments of mutated pdCas9 and pSB1C3 were isolated from the gel by following after the protocol form 02.07.2018.
Plasmid isolation of Gibson assembled LITMUS28i vector:
The Gibson assembled LITMUS28i vector was isolated from two overnight cultures (L1 and L2) by following after the same protocol from 22.07.2018.
Test digest the Gibson assembled LITMUS28i vector:
The vectors were digested with two different enzyme pairs.
The samples cut with AlwNI and EcoRI were incubated at 37 ℃ for 2 hours, while the samples cut with PstI and EcoRI were incubated for 1 hour.
Gel separation of enzymatic digested L1 and L2:
3.34 μL loading dye was added to each sample, the DNA fragments were visualized by running them on gel red at 90 V for 45 min.
Results:
Successfully transformed cells with LITMUS28i (probably with dCas9 and gRNA with anti-luxS) The concentrations of the fragments of mutated pdCas9 and pSB1C3 were too low (negative values)… L2 may be the correct Gibson assembled phagemid. However, there is an extra segment with a length approx. 6000 bp. Probably, the enzymatic activity of AlwNI is slower compared to EcoRI and PstI, hence some fragments were not cut by AlwNI. In order to verify this, another sample of L2 was cut with AlwNI and EcoRI and incubated overnight at 37℃.
-
Sept22
Gel separation of digested mutated pdCas9, pSB1C3 and Gibson assembled LITMUS28i, DNA isolateion of digested pdCas9 and pSB1C3
Goal:
- Gel separation of fragments from enzymatic digested mutated pdCas9, linear pSB1C3 and Gibson assembled LITMUS28i vector.
- Gel digestion and isolation of the desired DNA fragments of pdCas9 and linear pSB1C3.
- Incubate new samples of mutated pdCas9 and linear pSB1C3 were incubate overnight with restriction enzymes.
- Revive competent cells with mutated pdCas9 (PC1)
Procedure:
Gel separation:
Fragments of mutated pdCas9 and pSB1C3 (digested with EcoRI and PstI overnight) were separated on gel green. The desired segments were cut out and isolated from the gel by following after the same procedures from 02.07.2018.
Fragments of L2 (incubated from yesterday – 21.09.2018) were digested with AlwNI and EcoRI, separated and visualized on gel red.
Revive competent cells with mutated pdCas9:
Cells with PC1 stored at -80 ℃ were inoculated in LB medium with CM and incubated overnight at 37 ℃ with shaking.
We were running out of plasmids with mutated pdCas9, so it’s necessary to isolate the them from the cells again…
Restriction digest mutated pdCas9 (PC2) and linear pSB1C3:
PC2: 10 μL DNA, 2 μL 2.1 buffer, 0.5 μL EcoRI, 0.5 μL PstI, 7 μL ddH2O
pSB1C3: 10 μL DNA, 2 μL 2.1 buffer, 0.5 μL EcoRI, 0.5 μL PstI, 7 μL ddH2O
The samples were incubated overnight at 37 ℃
Results:
The concentrations of the desired fragments of pdCas9 and pSB1C3 were too low to be detected. New samples of mutated pdCas9 and pSB1C3 were incubated with EcoRI and PstI overnight
. -
Sept23
Ligation of mutated pdCas9 and pSB1C3, plasmid isolation, digestion of mutated pdCas9 and pSB1C3
Goal:
- Ligation of enzymatic digested pSB1C3 and mutated pdCas9
- Plasmid isolation from overnight cultures
- Digest the mutated pdCas9 and pSB1C3 with restriction enzymes
Procedure:
Ligation of DNA fragments:
According to the protocol for ligation of DNA fragments, the amount of the fragments was calculated by using the NEBiocalculator.
We assume that all of the DNA is completely cut by the enzymes, so we have 400 ng dCas9 and 250 ng digested backbone
The concentration of PC2 is 40 ng/μL and 10 μL pdCas9 was cut with enzymes, while the concentration of linear pSB1C3 was 25 ng/ μL and 10 μL was digested.
If we would like to have 25 ng backbone in the reaction solution, we should have approx. 181.3 ng dCas9 according to NEBiocalculator with the ratio of 3:1 for insert and backbone.
The theoretical concentration of the digested pdCas9 is 20 ng/ μL (total 400 ng plasmid was cut, and the final volume in the restriction digest tube was 20 μL), and 12.5 ng/ μL for the digested pSB1C3 (total 250 ng linear pSB1C3 was cut, and the final volume in the restriction digest tube was 20 μL).
Thus, the volume of the different compounds for ligation is
- 2 μL T4 DNA ligase buffer
- 1 μL T4 DNA ligase
- 2 μL Backbone
- 10 μL dCas9
- 5 μL ddH2O
- Total volume: 20 μL
The sample was incubated at 16 ℃ overnight
P.S. The fragments were not separated on gel before ligation (after so many times of failure to isolate DNA from gel…), wrong insert or re-ligation of pdCas9 fragments may occur…
Plasmid isolation from competent cells:
The plasmid with mutated pdCas9 was isolated from two cell cultures by following the same procedure from 02.07.2018.
Enzymatic digestion of mutated psCas9 and linear pSB1C3:
PCI: 17 μL DNA, 2 μL 2.1 buffer, 0.5 μL EcoRI, 0.5 μL PstI
Dried linearized pSB1C3 was resuspended with 10 μL ddH2O to obtain the final concentration 100 ng/ μL
pSB1C3: 9 μL DNA (100 ng/ μL), 2 μL 2.1 buffer, 0.5 μL EcoRI, 0.5 μL PstI, 8 μL ddH2O
The samples were incubated overnight at 37 ℃.
Week39Week 39
-
Sept24
Gel separation and DNA isolation of digested pSB1C3 and mutated dCas9, transformation of ligation product, amplification of mutated pdCas9 and pSB1C3
Goal:
- Separation of DNA fragments on gel
- Gel digestion and DNA isolation of dCas9 and pSB1C3
- Transformation of ligation product
- Amplify mutated dCas9 and linear pSB1C3
Procedure:
Gel electrophoresis:
Enzymatically digested pdCas9 and pSB1C3 (prepared from yesterday - 23.09.2018) were separated on gel green at 90 V for 45 min.
Gel digestion and DNA isolation:
The desired fragments of dCas9 and backbone were cut out from the gel. The DNA fragments were further isolated by following after the same procedure fromn02.07.2018.
Transformation of ligation product into competent cells:
Heat inactivate the ligase at 65 ℃ for 20 min Transform 5 μL of ligation product into competent cells by following the protocol from 25.06.2018 P.S. The fragments were not separated on gel before ligation (after so many times of failure to isolate DNA from gel…), wrong insert or re-ligation of pdCas9 fragments may occur… so inoculate more colonies and store one of the plates sealed with parafilm in the fridge.
Amplify mutated pdCas9 and pSB1C3:
PCR mix for amplification of pdCas9 and pSB1C3 were prepared by mixing:
pdCas9: 0.5 μL template (PCII, 65.8 ng/ μL), 6 μL FWD GA1 primer, 6 μL REV GA3 primer, 12.5 μL Takara HiFi PCR premix.
This sample was amplified in a PCR machine with an annealing temperature at 55 ℃ for 10 s, and an elongation temperature at 72 ℃ for 7 min.
pSB1C3: 1 μL template (linear pSB1C3, 25 ng/ μL), 6 μL FWD primer, 6 μL REV primer, 12.5 μL Takara HiFi PCR premix.
The sample of pSB1C3 ran in a PCR machine with an annealing temperature at 55 ℃ for 10s, and an elongation temperature 72 ℃ for 2 min.
Nanodrop - mutated dCas9 and backbone:
The concentrations of enzymatically digested pdCas9 and pSB1C3 were too low to be detected (negative values).
Therefore, the mutated pdCas9 and pSB1C3 were amplified via PCR to increase the amount. Further we plan on cutting the PCR product with restriction enzymes over two nights, before separation on gel and isolate the desired fragments. This may increase the concentration of the products after gel digestion. Probably, heat inactivation of the restriction enzymes after gel digestion and DNA isolation may be a good idea (most of the enzymes are separated from the DNA fragments on gel), before the ligation step.
-
Sept25
Restriction digest of PCR-amplified mutdCas9 and pSB1C3; Media and agarose gel preparation; Inoculation
Goal:
- Restriction digest of PCR-amplified mutated dCas9 and pSB1C3
- Make LB and M63B1 medium
- Make 0.8% agarose GelRed and GelGreen
- Inoculation of LB medium with transformed bacteria
Procedure:
Restriction digest of mutated dCas9 and pSB1C3:
PCR-amplified dCas9 and pSB1C3 were digested in separate tubes. The restriction mixtures were made by combining:
- 17 µL PCR-amplification product (mutated dCas9 or pSB1C3)
- 2 µL NEB 2.1 buffer
- 0.5 µL EcoRI-HF
- 0.5 µL PstI
- The restriction mixtures were incubated at 37 °C for two days.
Media preparation
Both, LB and M63B1 medium were prepared as described previously (____). The pH was adjusted to 7.1-7.2 by adding NaOH. The media were autoclaved and stored for later use.
Agarose gel preparation
For preparation of 200 mL of both GelGreen and GelRed 0.8% agarose gel, 1.6 g agarose was added to 200 mL 1xTAE. The solution was heated in a microwave until the agarose was completely dissolved (approximately 3 min at maximum heat). The gel was cooled down before 10 µL of dye (GelGreen or GelRed) was added.
Colony picking and inoculation
Four colonies from agar plates with bacteria transformed with possibly ligated dCas9 and pSB1C3 were picked and inoculated in 25 mL LB medium containing 25 µL chloramphenicol. The cultures were incubated at 37 °C with shaking (225 rpm) until the next day.
-
Sept26
Miniprep and nanodrop of yesterday's cultures
Goal:
Miniprep yesterday’s bacterial cultures
Measure quantity and quality of miniprep product (Nanodrop)
Procedure:
The OD600 value of the bacterial cultures from yesterday were measured. The cultures were diluted to a final OD600 value of about 1, and miniprepped following the ZR Plasmid Miniprep protocol. The isolated plasmids were nanodropped and stored at 4 °C till next day.
-
Sept27
**Gel separation and purification of PCR-ampl. dCas9 and pSB1C3; Restriction digest of isolated plasmids from Sept. 25th-cultures
Goal:
- Gel separation and purification of digested PCR-amplified dCas9 and pSB1C3
- Measure the quality and quantity of the purified product (Nanodrop)
- Restriction digest of yesterday’s miniprep product
Procedure:
Gel separation and purification of digested PCR-amplified dCas9 and pSB1C3
4 μL loading dye was added to the digested PCR-amplified dCas9 and pSB1C3 backbone and the total volume of the samples (24 μL) were run on a 0.8% agarose gel containing GelGreen. The bands at approximately 5000 bp and 2000 bp for dCas9 and pSB1C3, respectively, were excised from the gel. The plasmid fragments were further purified following the ZymocleanTM Gel DNA Recovery protocol, using 480 μL and 210 μL ADB buffer for dCas9 and pSB1C3 backbone, respectively. The concentration and quality of the products were measured using the Nanodrop.
Restriction digest of plamids isolated from colonies
Yesterday’s miniprepped plasmids from the bacterial cultures with potentially correctly ligated dCas9 into the pSB1C3 backbone were nanodropped and digested with EcoRI-HF and PstI at 37 °C for about 2 hours. The products was ran on a 0.8% agarose gel containing GelRed.
- 7.5 μL dH2O
- 0.5 μL EcoRI-HF
- 0.5 μL PstI
- 2.0 μL NEB 2.1 buffer
- 10 μL miniprepped plasmids
-
Sept28
Gel showed failed ligation of mut dCas9 and backbone, started new ligation process
Goal:
Analyze ligated mutdCas9 and backbone
Procedure:
Gel electrophoresis of enzyme digested mutated dCas9:
Ran tube 1, 2, 3 and 4 on gel electrophoresis.
Ligation of mutated dCas9 and iGEM-backbone:
Started ligation process of mutated dCas9 and iGEM-backbone from samples collected in the freezer.
How we did it:
- Added (in order) 2uL T4 DNA ligase buffer, 3uL backbone, 9,5 uL mutated dCas9, 4,5 uL ddH2O and 1uL T4 DNA ligase (thawed in room temperature, no contact with hands)
- mixed gently by pipetting up and down
- microfuged tubes at 16^C, 10 rpm in one minute.
- incubated at 16*C over night
Watered out DNA fragments from idt:
- Both DNA fragments from idt were watered out with 40 uL ddH2O till a concentration of 25ng/uL. stored in fridge.
Next step will be: PCR amplification->run gel and isolate -> nanodrop to find concentration -> Gibson assembly with primers (same primers as with RRvT biobrick)
Results:
Gel electrophoresis:
Had only two bands on gel, which meant that the backbone and the mutated dCas9 was not ligated correctly.
-
Sept29
Ligation of PCR amplified dCas9 and pSB1C3; Restriction digest of dCas9-fragments ordered from IDT
Goal:
Ligation of PCR-amplified dCas9 and pSB1C3
Restriction digest and ligation of dCas9 ordered from IDT in two separate parts
Procedure:
Ligation of PCR-amplified dCas9 and pSB1C3
The gel purified dCas9 and pSB1C3 backbone were heated at 80 °C for 20 min in order to heat kill any restriction enzymes still present in the samples. The ligation mixture was prepared as follows:
- 2 μL T4 DNA ligase buffer
- 1 μL T4 DNA ligase
- 3 μL backbone
- 9 μL dCas9 (Note! Not fully 9 μL was added)
- 5 μL ddH2O
- The fragments were incubated overnight at 16 ºC
Restriction cutting and ligation of dCas9 ordered from IDT in two separate parts
The two dCas9 fragments were restriction digested in separate tubes with BtgI. The recipe for the restriction mixtures is given below. Each fragment was handled similarly.
- 20 μL dCas9 (diluted yesterday)
- 1 μL BtgI
- 5 μL cutsmart buffer
- 24 μL dH2O
The fragments were digested at 37 ºC for about 2 hours and the restriction enzymes were then heat killed at 80 ºC for 20 min. Finally, the separate dCas9 fragments were combined in ligation mixtures with varying concentrations of dCas9 and T4 DNA ligase buffer:
- 2 μL | 2 μL | 2.5 μL T4 DNA ligase buffer
- 1 μL T4 DNA ligase (same for all)
- 5 μL | 10 μL | 15 μL dCas9 fragment 1
- 5 μL | 10 μL | 15 μL dCas9 fragment 2
The ligation reaction was run overnight at 16 ºC.
-
Sept30
**Transformation of PCR-amplified dCas9 and pSB1C3; Verification of ligated dCas9 fragments from IDT
Goal:
Transformation of PCR-amplified dCas9 and pSB1C3 into competent DH5α cells.
Verification of ligated dCas9 fragments from IDT
Procedure:
Transformation of PCR-amplified dCas9 and pSB1C3 into competent DH5a cells
Prior to the transformation, the T4 DNA ligase was heat killed at 80 ºC for 20 min. 5 μL of the ligation mixtures prepared September 28th and 29th was added to separate tubes of thawed competent DH5α cells. The cells were incubated on ice for 20 min, heat shocked at 42 ºC for 45 sek, 950 μL LB was added and the cells were further incubated for 1.5 hour at 37 ºC with shaking (225 rpm). 100 μL of the cell suspensions were added to agar plates containing chloramphenicol. The suspensions were then centrifuged at 6800 g for 4 min, and about 800 μL of supernatants were discharged. The cell pellets were resuspended in the remaining medium and plated.
Verification of ligated dCas9 fragments
The overnight ligation mixtures with the dCas9 fragments from IDT were heated at 80 ºC for 20 min. The total volume for each of the samples were run at 85 V for 45 min on an 0.8% agarose gel containing GelGreen. Fragments at 2000 bp and 3000 bp was excised from the gel and purified following the ZymocleanTM Gel DNA Recovery protocol. The recovered fragments were stored -20 ºC in case of further usage.
Week40Week 40
-
Oct1
Single colony picking and inoculation (Bacteria with potentially correctly ligated PCR-amplifed dCas9 and pSB1C3)
Goal:
Check colony formation on yesterday’s prepared agar plates
If colonies, pick a few single colonies and make pure bacterial cultures
Procedure:
Colonies were visible on all 7 agar plates. 7 colonies were picked and inoculated in 25 mL LB with 25 μL chloramphenicol. The cultures were incubated overnight at 37 °C with shaking (225 rpm).
-
Oct2
Failed ligation of dCas9 and pSB13
Goal:
Verify successful ligation of mutated dCas9 and iGEM-backbone by:
- Isolating plasmids from overnight cultures
- Digest the plasmids containing mutated pdCas9 ligated with pSB1C3.
- Verify with gel electrophoresis
Procedure:
Yesterday 7 colonies were picked and incubated in culture medium overnight. Today, plasmids from each culture were isolated using the miniprep protocol.
The concentrations in each parallel were found using Nanodrop. After the plasmids were isolated they were digested using the BamH1 and Pst1 restriction enzymes (we used 3.5uL plasmids). If we have the correct plasmids, then there will be two fragments, one at 6181bp and one at 893bp.
Gel electrophoresis is performed using GelRed and standard protocol.
The remaining plasmids from the plasmid isolation (not enzyme digested) are stored in the freezer in the phage-lab. They are in the brown case and are marked "dCas9 +bb 02.10.18".
Results:
Gel electrophoresis showed only one band at about 1000bp. Cannot explain why (only backbone should be at 2000bp)
-
Oct3
No lab
No lab -
Oct4
Transformation of biobricks; Making of bacterial cultures (mutdCas9, RRvT and mRFP1)
Goal:
Transform biobrick BBa_K592009 (plate 1, well 19E) and BBa_K592010 (plate 6, well 17G) into competent DH5α cells
Make bacterial cultures of mutated dCas9 (with Addgene backbone), RRvT and mRFP1
Procedure:
Transformation
10 μL ddH2O was used to resuspend the biobricks. For the transformation, 1.5 μL of the biobrick resuspensions were added to competent DH5α cells. The transformation was performed as described in our protocol section with slight modification: 1.5 μL of the biobrick resuspensions were added to competent DH5α cells, and 950 μL LB added prior to a 1.5 hour incubation time. The cells were plated on agar plates with chloramphenicol as the selective marker.
Make bacterial cultures
Bacterial cultures with mutated dCas9 (with Addgene backbone), RRvT and mRFP1 was made by inoculating previously transformed stored bacterial stocks in 25 mL LB medium containing 25 μL chloramphenicol. The cultures were incubated at 37 °C with shaking.
-
Oct5
Miniprep and restriction cutting of biobrick blue+dcas
Goal:
- To get enough DNA for the backbone (blue) and dcas seperately to be ready for ligation.
Procedure:
1. 2 colonies of blue biobrick were picked and inoculated in LB+CM for 6h until OD-0.3. Checked the OD of dCas culture and diluted to approximately 1,4.
2. Did a miniprep from the inoculated culture of blue biobrick(3 paralelles) + dcas(2 paralelles per culture)
3. Test digest with restriction enzymes Pst1 (0.5 ul) and EcoR1-HF (0,5 ul), with NEBuffer 2.1 (2 ul) and water (see table) overnight at 37 degrees.
-
Oct6
Gel electrophoresis and purification of digested mutdCas9 and biobricks; Repeated miniprep and digestion of biobricks
Goal:
- Gel elecrohoresis of yesterday’s digested mutated dCas9 and biobricks
- If visible, gel purification of bands at appr. 2000 for the biobricks (= pSB1C3 backbone) and 5000 bp for dCas9
- Measure quantity and quality of purified product (Nanodrop)
Procedure:
Gel electrophoresis, purification and nanodrop
The restriction enzymes in each sample was heat killed at 80 °C for 20 min. 4 μL loading dye was added to the samples and the total volumes of each sample (24 μL) were run at 80 V for 45 min on a 0.8% agarose gel containing GelGreen. Since neither of the biobrick replicates (B1 and B2) gave any visible bands, only the 5000 bp bands for two of the mutated dCas9 replicates (1.1 and 1.2) was excised from the gel.
The gel purification was conducted following the ZymocleanTM Gel DNA Recovery protocol, using 216 μL and 252 μL ADB buffer for dCas9 sample 1.1 and 1.2, respectively. The quantity and quality of purified product using Nanodrop.
Addition to the planned goal: Miniprep of BBa_K592009 and BBa_K592010 transformed bacterial cultures
Since the biobricks did not give any visible bands on the gel, bacterial cultures with cells transformed with BBa_K592009 and BBa_K592010 were miniprepped again. The cultures were diluted to a final OD600 value of about 1, and then two of the cultures containing BBa_K592009 and one culture containing BBa_K592010 was miniprepped following the ZR Plasmid MiniprepTM protocol. The quantity and quality of the miniprep products were measured using the Nanodrop. The isolated biobricks were then digested by combining:
- 15 μL sample (appr. 1500 ng, for all three samples)
- 0.5 μL EcoRI-HF
- 0.5 μL PstI
- 2 μL NEB 2.1 buffer
- 2 μL ddH2O
The restriction mixtures were incubated overnight at 37 °C with shaking (225 rpm).
-
Oct7
Gel purification of digested biobricks; Ligation of mutdCas9 and digested biobrick backbone; Transformation of ligation mixture
Goal:
- Gel purification of overnight digested biobricks
- Measure quantity and quality of the purified digested biobricks
- Ligation of mutated dCas9 and digested biobricks
- Transformation of ligation mixture into competent DH5α cells
Procedure:
Gel purification of overnight digested biobricks
The overnight digested biobricks were heated at 80 °C for 20 min. Loading dye was added and the samples were run on a 0.8% agarose gel containing GelGreen. The bands at approximately 2000 bp was excised from the gel, and the fragments was recovered following the ZymocleanTM Gel DNA Recovery protocol. The quantity and quality of the purified digested biobricks were measured using the Nanodrop.
Ligation of mutated dCas9 and digested biobricks
The mutated dCas9 samples, which were gel purified yesterday, were ligated with the isolated pSB1C3 backbone of the biobricks. Two ligation mixtures was prepared using dCas9 1.1 and the backbone from BBa_K592009 (sample B2) and dCas9 1.2 and the backbone from BBa_K592010 (sample G2):
- 2 μL T4 DNA ligase buffer
- 5 μL T4 DNA ligase
- 16 μL dCas9 1.1 (40.0 ng) | 16 μL dCas9 1.2 (33.6 ng)
- 1 μL pSB1C3 from BBa_ (40.1 ng) | 1 μL pSB1C3 from BBa_ (32.5 ng)
- 5 μL ddH2O
- The ligation mixtures were incubated at 37 C for 2 hours.
Transformation of ligation mixture
10 μL of each ligation mixture was used in the transformation of competent DH5α cells. Also, 950 μL of LB was added prior to a 1.5 hours incubation period. Otherwise, the transformation was conducted as described in our protocol section.
Week41Week 41
-
Oct8
No lab
No lab. -
Oct9
Miniprep and shipment preparation of our biobricks: mutdCas9-pSB1C3 and RRvT
Goal:
Dilute bacterial cultures with correctly inserted dCas9 into pSB1C3 and cultures containing RRvT
Miniprep plasmids from bacterial cultures
Measure quantify and quality of miniprep product (Nanodrop)
Plate and air dry plasmids
Procedure:
The bacterial culture with correctly inserted dCas9 (verified yesterday by colony PCR) and a culture containg RRvT were diluted to an OD600 of about 0.2. The cultures were incubated at 37 °C with shaking (225 rpm) until the OD600 reached a value of approximately 1. The plasmids were isolated following the ZR Plasmid MiniprepTM protocol and the quantity and quality of the products were measured by the Nanodrop. The miniprepped products were then diluted to a final concentration of 50 ng/μL for each of the samples. 10 μL diluted mutated dCas9-pSB1C3 plasmid and 10 μL diluted RRvT-pSB1C3 plasmid was plated on the 96-well plate to be shipped to iGEM Headquarters. The samples were left to air dry in the fume hood until the next day.
-
Oct10
No lab
Oct11Double transformation with pgRNA and new pdCas9
Goal:
1. Transformation of pgRNA and pdCas9 into DH5a and TG1-cells.
Procedure:
Both pdCas9(2) and pgRNA(2) with anti-luxS were simultaneously transformed into competent cells (DH5α) after the following protocol:
- Thaw competent cells on ice.
- Add pdCas9(2) (5μL) and pgRNA(2) with anti-luxS (5μL) to the same tube containing competent cells.
- Incubate the cells on ice for 20min.
- Heat shock the cells for 45s at 42℃.
- Incubate the cells on ice for 2min.
- Add LB- medium (900μL).
- Incubate the cells for 1.5h (max. 2h) at 37℃ with shaker.
- Plate the cells (100μL) on agar with AMP and CM
- Centrifuge the cell culture for 3min at 6800g.
- Discard the supernatant (200μL)
- Resuspend the pellet with the remining supernatant in the tube
- Plate the cells (100μL) on agar with AMP and CM.
Results:
Colonies on the plates with DH5a. No colonies on the plates with TG1.
Oct12(Failed) Double transformation with pgRNA and new pdCas9 into TG1-cells.
Goal:
1. Transform pgRNA and new pdCas9 into TG1-cells.
Procedure:
Both pdCas9(2) and pgRNA(2) with anti-luxS were simultaneously transformed into competent cells (TG1) after the following protocol:
- Thaw competent cells on ice.
- Add pdCas9(2) (5μL) and pgRNA(2) with anti-luxS (5μL) to the same tube containing competent cells.
- Incubate the cells on ice for 20min.
- Heat shock the cells for 45s at 42℃.
- Incubate the cells on ice for 2min.
- Add LB- medium (900μL).
- Incubate the cells for 1.5h (max. 2h) at 37℃ with shaker.
- Plate the cells (100μL) on agar with AMP and CM (make minimum 5 plates)
- Centrifuge the cell culture for 3min at 6800g.
- Discard the supernatant (200μL)
- Resuspend the pellet with the remining supernatant in the tube
- Plate the cells (100μL) on agar with AMP and CM.
Results:
Bacteria colonies did not appear on agar plates the following day.
Oct13(Failed) Double transformation with pgRNA and new pdCas9 into TG1-cells.
Goal:
1. Transform pgRNA and new pdCas9 into TG1-cells.
Procedure:
Both pdCas9(2) and pgRNA(2) with anti-luxS were simultaneously transformed into competent cells (TG1) after the following protocol:
- Thaw competent cells on ice.
- Add pdCas9(2) (5μL) and pgRNA(2) with anti-luxS (5μL) to the same tube containing competent cells.
- Incubate the cells on ice for 20min.
- Heat shock the cells for 45s at 42℃.
- Incubate the cells on ice for 2min.
- Add LB- medium (900μL).
- Incubate the cells for 1.5h (max. 2h) at 37℃ with shaker.
- Plate the cells (100μL) on agar with AMP and CM (make minimum 5 plates)
- Centrifuge the cell culture for 3min at 6800g.
- Discard the supernatant (200μL)
- Resuspend the pellet with the remining supernatant in the tube
- Plate the cells (100μL) on agar with AMP and CM.
Results:
Bacteria colonies did not appear on agar plates the following day.
Oct14Double transformation TG1 and miniprep of pgRNA
Goal:
- Transformation of TG1 cells with the new dCas sequence (with iGEM backbone) and pgRNA
Procedure:
1. Eluted DNA from DH5α-cells with only pgRNA by following the protocol for ZR miniprep. 4 tubes of miniprepped pgRNA was made and stored in the fridge.
2. Did a double transformation of TG1-cells with both pgRNA and dCas by following the same protocol as the day befor, but changing the volume of DNA added and the growing time before plating. Two paralelles of our supercompetent TG1-cells and two paralelles of TG1 (felles) were made. 10 μL of pgRNA and 10 μL of dCas was added to each of them, and they were growing for 3 hours before plating on LA-petri dishes with CM and AMP.
Results
Transformation was successfull.
Nanodrop results from the miniprep of cells with pgRNA:
ng/ul A260/A280 A260/A230 1 41.8 1.65 0.85 2 115.5 1.61 0.72 3 43.8 1.91 1.87 4 40.1 1.69 0.93 Succesful transformation, all the plates from the samples containing our supercompetent cells had colonies.
Week42Week 42
-
Oct15
Single colony pick, preparation of cell activity measurement
Goal:
Find out if the cell growth were affected by the prescence of tetracycline
Procedure
Colonies of successfully transformed TGI and DH5α were picked and thrown in beakers with LB + CM + AMP, and incubated at 37 °C and 220 RPM shaking.
Cells containing the RRvT and mRFP biobrick were incubated in their respectful beakers with LB + CM at 37 °C and 220 RPM shaking. These were incubated overnight.
-
Oct16
Biobrick measurement
Goal:
- Measure fluorescence of the RRvT and mRFP1 biobrick.
Procedure:
Cultures of RRvT and mRFP1 were diluted until OD=0.1. Then absorbance and fluorescence were measured by the TECAN plate reader. They were placed in wells in the following order:
When 0.8 OD600 was reached, IPTG was added in the wells (except the wells for negative control) at a concentration of 0, 0.5 or 1.0 mM according to the table above.Results:
The two biobricks showed similar properties when it comes to fluorescence. We found out that it wasn't optimal to use a transparent 96 well plate, and were lucky enough to borrow some black 96 well plates. Decided to repeat the experiment the next day using the black plates.
-
Oct17
BioBrick measurement and metabolic cell activity measurement.
Goal:
- Measure absorbance and fluoresence for the RRvT and RFP biobricks.
- Measure metabolic activity after 0 and 8 hours.
Procedure:
The biobricks (RRvT and RFP) was measured again with the same procedure as yesterday, but with a black 96 well plate.
See Protocols for general media preparation and XTT procedure.
Measurements of OD600 were taken and results presented in the table below.
OD600 (Post 6x dilution) LB (0.4% Glucose) 0.100 LB (0.8% Glucose) 0.096 LB (0.4% Glucose TET) 0.102 LB (0.8% Glucose TET) 0.100 M63B1 (0.4% Glucose) 0.093 M63B1 (0.8% Glucose) 0.097 M63B1 (0.4% Glucose, TET) 0.109 M63B1 (0.8% Glucose, TET) 0.108 Vitamine B was added to the M63B1 medium before inoculation to the 96 well plate in the following way: 0.9 ul of stock solution (90 ml, 0.9108 grams) was mixed in a bottle of M63B1 (900 ml).
0.9 mL MgSO4 and 18 mL glucose were also added to the M63B1 medium.
The media were mixed according to the table beneath.
Media Content LB, 0.4 % glucose TET 20 mL LB, 20 µL AMP, 20 µL CM, 0.4 mL 20% Glucose, 39.4 µL 0.5 mg/mL TET LB, 0.8 % glucose TET 20 mL LB, 20 µL AMP, 20 µL CM, 0.8 mL 20% Glucose, 60 µL 0.5 mg/mL TET LB, 0.4 % glucose 20 mL LB, 20 µL AMP, 20 µL CM, 0.4 mL 20% Glucose LB, 0.8 % glucose 20 mL LB, 20 µL AMP, 20 µL CM, 0.8 mL 20% Glucose M63B1, 0.4 % glucose TET 20 mL M63B1, 20 µL AMP, 20 µL CM, 20 µL 1M MgSO4*7H2O, 0.4 mL 20% Glucose, 39.4 0.5 mg/mL µL TET M63B1, 0.8 % glucose TET 20 mL M63B1, 20 µL AMP, 20 µL CM, 20 µL 1M MgSO4*7H2O, 0.8 mL 20% Glucose, 40 µL 0.5 mg/mL TET M63B1, 0.4 % glucose 20 mL M63B1, 20 µL AMP, 20 µL CM, 20 µL 1M MgSO4*7H2O, 0.4 mL 20% Glucose M63B1, 0.8 % glucose 20 mL M63B1, 20 µL AMP, 20 µL CM, 20 µL 1M MgSO4*7H2O, 0.8 mL 20% Glucose Then, the metabolic activity was measured by following the XTT protocol.
Results:
The cells showed no reduced activity because of tetracycline being present.
-