BL21 competent cells:
The chemically competent BL21 cells are suitable for protein expression from E. coli promoters, such as Ptac, Plac, Pbad, etc.
Genotype: E. coli B F– ompT gal dcm lon hsdSB(rB– mB–) [malB+]K-12(λS)
Transformation efficiency: ~5 x 104 cfu/µg pUC19 DNA
Shipped in: dry ice