Team:Ionis Paris/Protocol 6
Thaw a tube of DH5-alpha competent cells on ice for 10 min.
Protocol 6 : E.Coli dh5a and BL21 transformation (Heat-shock)
Aim: Introduce plasmid DNA in E.Coli bacteria
Mix gently and carefully pipette 50 µL of cells into a transformation tube on ice
Add 30 µL of plasmid DNA to the cell mixture (one tube for each ratio)
Carefully flick the tube 4-5 times to mix cells and DNA. Do not vortex.
Place the mixture on ice for 30 min. Do not mix.
Heat shock at exactly 42°C for 45 s. Do not mix.
Place on ice for 5 min. Do not mix.
Pipette 250 µL of room temperature SOC into the mixture.
Place at 37°C for 60 min at 250 rpm.
Warm selection plates to 25°C.
Mix the cells thoroughly by flicking the tube and inverting.
Spread 100 µL of cells onto selection plates.
Incubate all the plates O/N at 37°C.
