Transformation of E. coli with plasmid
sanjana
Abstract
This protocol can be used to transform electrocompetent E. coli cells with a plasmid.
Steps
Preparation
Wash cuvette with 100% (v/v)
ethanol and UV in the hood for 0h 20m 0s
Pre-thaw electrocompetent cells and plasmid on wet ice for 0h 10m 0s
Electroporation
Add 1µL
of plasmid DNA to 50µL
electrocompetent cells
Transfer cell-DNA mixture into the cuvette and add equal amount (50µL
) of MilliQ
Let the cuvette sit in wet ice for 0h 20m 0s
Place cuvette in BioRad pulser and pulse at 2.5 keV
Within 0h 0m 40s
add 100µL
of 2X LB to the cuvette
Incubation
Place cuvette in an incubator at 37°C
for 0h 30m 0s
Then use a bent pipette tip to spread the cuvette's contents onto a plate made with LB agar and the appropriate antibiotics. Spread until plate is dry
Place the plate in an incubator at 37°C
Make glycerol stocks of transformed cells and store for future use