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Team:Evry/Protocols/06
From 2013.igem.org
TECAN
Medium preparation
For the Tecan analysis we must use M9 medium and not a classical LB medium because turbidity and fluorescence of our sample are measured. Then, in order to obtain good results, the medium must not emit a side signal, that is why we use the M9 medium.
Composition for 50 mL of:
| Reagent | M9 medium (without iron) | M9 medium (with iron) |
|---|---|---|
| CaCl2 (1M) | 5 µL | |
| MgSO4 (1M) | 100 µL | |
| Glycerol (50%) | 10 mL | |
| Thiamine | 5 µL | |
| NaOH (pH 7.4) | 12.5 µL | |
| H2O | 40 mL | 39 mL |
| FeSO4 (10mM) | - | 50 µL |
| Casamino acids (0.2%) | - | 1 mL |
Once the mixture is prepared, the medium must be filtered to be sterilised using 0.22 µm filter.
TECAN analysis
Using the TECAN analysis, we are measuring the capacity of repression of the natural binding site that we extract from the E.coli's genome.
Preculture with M9 medium (with carbenicillin) have been launched for BL21 transformed with our 1st construction:
- Natural Fur Binding Site of Fec A + sfGFP (clone 1, 2, 3)
- Natural Fur Binding Site of Fep A + sfGFP (clone 1, 2, 3)
- Natural Fur Binding Site of Ace B + sfGFP (clone 1, 2, 3)
Note: Preculture have been made in M9 medium with iron in oder to inhibit the expression of sfGFP.
After one night of culture, time the precultures have been refreshed by diluting them 200 times in M9 medium (with iron and carbenicillin).
After 8 hours of culture, the 96 wells plate has been prepare (see following scheme).
AJOUTER DETAIL DES CYCLES
Tecan Analysis
Principle
Preparation
Analysis
