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Team:Evry/Notebook/w2
From 2013.igem.org
Week 2: 24th June - 30th June
Monday, June 24th
Our competents cells made on friday the 21st were plated and incubated the whole week-end at 30°C. Today, we analyzed the plates and came to the conclusion that the medium was contaminated due to poor protocol execution. As a consequence, we decided to make new LB medium and recalculate the antibiotic concentrations.
New competent cells have been made for all three strains: DH5-alpha, BL21 and TOP10.
Add 20 g of LB broth into 1000 mL of desalted water and autoclave.
Tuesday, June 25th
New competent cells have been made with the same strains of bacteria. We thought that the contamination of our cells was due either to the solution of CaCl2 that we used which may had not been sterile and/or incorrect manipulations. This time, we prepared new CaCl2 solutions that we made sure to autoclave correctly. Then, same tests as we did before of contamination and competence have been made.
Wednesday, June 26th
The DH5a strain was not contaminated and competent. The TOP10 strain was contaminated only on the Kanamycin petri dish and competent. The BL21 strain was contaminated and not usable.
Thurdsay, June 27th
We designed the plasmid constructions and primers we will use.
