Studies on the factors influencing the transformation in Escherichia coli with pBR 322 DNA
1984
Yoo, H.S. | Mah, J.S. (Seoul National Univ., Suwon (Korea R.). Coll of Veterinary Medicine)
To investigate the factors influencing the artificial transformation in Escherichia coli, E. coli C 600 was transformed by pBR322 DNA with tetracycline and ampicillin resistant gene purified by CsCL-EtBr equilibrium density gradient centrifugation from E. coli HB 101. The best conditions for the transformation of E. coli C 600 with pBR322 DNA were treatment with 100mM CaCl2, ice incubation at 0 deg C for 45 minutes, heat shock at 42 deg C for 4 min., 30 min. of ice incubation and incubation at 37 deg C for 100 min. for gene expression in that order
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