Team:UCLA/Notebook/Honeybee Silk/12 July 2015
Making competent Bl21(DE3) cells
- The starter culture from 7/11 overgrew to around an OD of 3 (want OD around 0.5) so I am re-picking colonies to make a new starter culture in 7 ml of LB broth. Put in 37 C incubator t 9:40 AM
- Using [http://www.zymoresearch.com/downloads/dl/file/id/166/t3001i.pdf this] protocol.
- At 1 pm (3 h 20 m) the OD was up to 0.52, (shooting for between 0.4 and 0.6)
- Added 0.5 ml to 50 ml of zymo broth. Left at RT for an hour and placed into 21 C incubator starting at 2 pm 7/12.
- The incubator started at around 27 C at 2 pm and is taking a while to ramp down.
- At 5:50 Pm the OD is 0.087, which seems rather high for only 4 hours. The protocol says 10 to 36 hours.