FIG. 2.

Expression of the gntT::lacZ fusion in wild-type and gntR mutant strains in the presence and absence of cAMP. The cells were grown in LB medium with carbon sources as indicated. Symbols: circles, wild type (NP100); squares, gntR mutant (PR201); open and filled symbols, in the absence and presence, respectively, of 5 mM cAMP. β-Galactosidase was measured in the cultures at the indicated OD₆₀₀ points.