Team:Bielefeld-Germany/Labjournal/Cultivation

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<h1>Cultivation</h1>
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<br><br>
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<a name="media"><span style="color:#ff6600; padding-left=22px">[Media]</span></a>
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<h1 style="color:#ff6600;">Cultivation</h1>
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<div class="sds_headline">
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<a name="sds"><span style="color:#ff6600; padding-left=22px">[SDS-PAGE]</span></a>
</div>
</div>
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<div class="media" >
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<div class="sds" >
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<br><b><u> Chloramphenicol stock solution</u></b>
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-
<p>-Solubilize 20 mg mL-1 Chloramphenicol in 100 % Ethanol </p>
+
-
<p>-Store at -20 °C</p>
+
-
<br><b><u> DNA loading buffer</u></b>
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<h3>Sodium dodecyl sulfate polyacrylamide gel electrophoresis</h3>
-
<p> - 50 % (v/v) glycerol </p>
+
<br><b><u>Pouring the polyacrylamide gel</u></b>
-
<p> - 1 mM EDTA </p>
+
<p>- Make a master mix for the stacking and separating gel without adding ammonium persulfate and TEMED</p>
-
<p> - 0.1 % (w/v) bromphenol blue </p>
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<p>- Aliquote 6,5 mL for each separating and 2,5 mL for each stacking gel</p>
-
<p> - Solve in ddH2O</p>
+
<p>- Add ammonium persulfate and TEMED to each separating gel aliquote and pour the solution quickly into your gel casting form. Leave about 2 centimeters below the bottom of the comb for the stacking gel</p>
 +
<p>- Layer isopropanol on top of the ge</p>
 +
<p>- Leave the separating gel at room temperature for >60 minutes to polymerize</p>
 +
<p>- Remove isopropanol and wait until the surface is dry</p>
 +
<p>- Add ammonium persulfate and TEMED to each separating gel aliquote and pour the solution quickly into your gel casting form</p>
 +
<p>- Insert comb without getting bubbles stuck underneath</p>
 +
<p>- Leave the gel at room temperature for >60 minutes to polymerize</p>
 +
<br>
 +
<p><i>For storage:</i></p>
 +
<p style="padding-left:44px;"> -Remove sealing and store the gel wrapped in moistened paper towel at 4°C</p>
 +
<br>
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<br><b><u> LB medium</u></b>
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<br><b><u>Preparing the sample</u></b>
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<p> - 10 g Trypton </p>
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<p>- Mix your protein mixture 4:1 with Laemmli-buffer (30 mL protein solution + 10 mL Laemmli-buffer)</p>
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<p> - 5 g yeast extract </p>
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<p>- Heat for 5 minutes at 95 °C</p>
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<p> - 10 g NaCl </p>
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<p><i> - 12 g Agar-Agar (for plates) </p></i>
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<p> - Adjust pH to 7.4</p>
+
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<br><b><u>M9 medium</u></b>
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<p>For 1 L <b>M9 mineral medium</b> you need 867 mL sterile water <i>(for plates add 16 g Agar-Agar as well)</i>. Then add (in the following order:</p>
+
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<p> - 300 µL 1 M CaCl2
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</p>
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<p> - 100 mL 5x M9 salt solution</p>
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<table border=1; style="margin-left=22px">
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      <col width="150">
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      <col width="50">
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<tr><th><b> 10x M9 salt solution</b></th><th></th><tr>
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<tr> <td align="center">Na2HPO4-2H2O</td>      <td align="center">75.2 g/L</td> </tr>
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<tr> <td align="center">KH2PO4</td>      <td align="center">30 g/L</td> </tr>
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<tr> <td align="center">NaCl</td>      <td align="center">5 g/L</td> </tr>
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<tr> <td align="center">NH4Cl</td>      <td align="center">5 g/L</td> </tr>
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</table>
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<br>
<br>
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<p> - 20 % glucose
 
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      <col width="150">
 
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      <col width="100">
 
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<tr><th><b> </b></th><th></th><tr>
 
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<tr> <td align="center"><b>20 % Glucose</b></td>  <td align="center">20 % (w/v)glucose</td>  <td align="center">200 g/L</td> </tr>
 
-
    </table>
 
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<p>      For 500 mL stock solution add 100 g glucose to 440 mL water. Autoclave for 15 at 121° C</p>
 
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<p> - 1 M MgSO4 </p>
 
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<p> - 1 mL biotin (1 mg/mL)</p>
 
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<p> - 1 mL thiamin (1 mg/mL)</p>
 
-
<p> - 10 mL 100x trace elements solution <p>
 
 +
<br><b><u>Running the gel</u></b>
 +
<p>- Remove sealing, put the polymerized gel into gel box and pour SDS running buffer into the negative and positive electrode chamber</p>
 +
<p>- Remove comb without destroying the gel pocket</p>
 +
<p>- Pipet the sample into the gel pockets, adjusting the volume according to the amount of protein in your sample. Make sure to include a lane with molecular    weight standards (PageRuler Prestained Protein Ladder™ (Fa. Fermentas)) to determinate the molecular weight of your sample</p>
 +
<p>- Connect the power lead and run the stacking gel with 10 mA until the blue dye front enters the separating gel</p>
 +
<p>- Raise amperage up to 20 mA for running the separating gel</p>
 +
<p>- When the distance of the lowest molecular weight standard lane to the gel end is down to 0.5 cm stop the electrophoresis by turning off the power supply</p>
-
<br><br><br><br>
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<br><br>
</div>
</div>
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<p> • A</p>
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<br><b><u>TAE buffer</u></b>
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<p> • I</p>
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<p>For 1 L of 50 x TAE buffer you need:</p>
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<p> • A</p>
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<p> - 242.48 g Tris </p>
+
<p> • I</p>
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<p> - 41.02 g Sodiumacetate</p>
+
 
-
<p> - 18.612 g EDTA </p>
+
-
<p> - Adjust pH to 7.8 with acetic acid </p>
+
-
<p> - Solve in dH2O </p>
+
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<p><i>10 mL of the stock is diluted in 1 L dH2O for the gel electrophoresis (0.5 x TAE buffer) </i></p>
 
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Latest revision as of 11:34, 26 September 2013







Cultivation


[SDS-PAGE]

Sodium dodecyl sulfate polyacrylamide gel electrophoresis


Pouring the polyacrylamide gel

- Make a master mix for the stacking and separating gel without adding ammonium persulfate and TEMED

- Aliquote 6,5 mL for each separating and 2,5 mL for each stacking gel

- Add ammonium persulfate and TEMED to each separating gel aliquote and pour the solution quickly into your gel casting form. Leave about 2 centimeters below the bottom of the comb for the stacking gel

- Layer isopropanol on top of the ge

- Leave the separating gel at room temperature for >60 minutes to polymerize

- Remove isopropanol and wait until the surface is dry

- Add ammonium persulfate and TEMED to each separating gel aliquote and pour the solution quickly into your gel casting form

- Insert comb without getting bubbles stuck underneath

- Leave the gel at room temperature for >60 minutes to polymerize


For storage:

-Remove sealing and store the gel wrapped in moistened paper towel at 4°C



Preparing the sample

- Mix your protein mixture 4:1 with Laemmli-buffer (30 mL protein solution + 10 mL Laemmli-buffer)

- Heat for 5 minutes at 95 °C



Running the gel

- Remove sealing, put the polymerized gel into gel box and pour SDS running buffer into the negative and positive electrode chamber

- Remove comb without destroying the gel pocket

- Pipet the sample into the gel pockets, adjusting the volume according to the amount of protein in your sample. Make sure to include a lane with molecular weight standards (PageRuler Prestained Protein Ladder™ (Fa. Fermentas)) to determinate the molecular weight of your sample

- Connect the power lead and run the stacking gel with 10 mA until the blue dye front enters the separating gel

- Raise amperage up to 20 mA for running the separating gel

- When the distance of the lowest molecular weight standard lane to the gel end is down to 0.5 cm stop the electrophoresis by turning off the power supply






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