FIG. 5.

Growth of mutant G71on lactose and in a mixture of lactose and galactose. (A) Cells were grown at 37°C in M17 medium containing 58 mM lactose. Symbols: ○, growth; • and ▪, concentrations of lactose and galactose, respectively, in the medium. (B) Mutant G71 was grown in a medium containing 4 mM lactose and 4 mM galactose. The symbols are as indicated in panel A.