FIG. 1.

Effects of different concentrations of NaCl or KCl on the growth of E. coli strain KNabc or TK2420 transformed with control plasmid or pGerN. (A) Growth of E. coli KNabc transformants in the presence of increasing NaCl concentrations was measured after 15 h at 37°C. (B) Growth of E. coli TK2420 transformants in the presence of increasing KCl concentrations was measured after 15 h at 37°C. Open circles, control vector; solid circles, pGerN.