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Team:Bielefeld-Germany/Labjournal/Analytics
From 2013.igem.org
Analytics
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
Fluorescence measurements
Measuring of mRFP with Tecan Infinite® M200 platereader
Take at least 500 µL sample for each measurement (200 µL is needed for one measurement) so you can perform a repeat determination Freeze biological samples at -80 °C for storage, keep cell-free at 4 °C in the dark To measure the samples thaw at room temperature and fill 200 µL of each sample in one well of a black, flat bottom 96 well microtiter plate (perform at least a repeat determination) Measure the fluorescence in a platereader (we used a Tecan Infinite® M200 platereader) with following settings: 20 sec orbital shaking (1 mm amplitude with a frequency of 87.6 rpm) Measurement mode: Top Excitation: 584 nm Emission: 620 nm Number of reads: 25 Manual gain: 100 Integration time: 20 µs
