FIG. 2.
Similar increases in expression of cydA are observed in a rex strain and by deletion of the binding sites in the cydA promoter fusion in a WT strain. Growth and β-galactosidase expression in cells cultured for 8 h in NSMPG are shown. Solid symbols, growth; open symbols, β-galactosidase activity. Symbols: ▪, MH5878 (JH642 cydA-lacZ); •, MH5895 (JH642 cydA3′del-lacZ); ▴, MH6064 (rex cydA-lacZ); ▾, MH6065 (rex cydA3′del-lacZ). Cartoons above the graph show regions of the promoter fused to lacZ. OD540, optical density at 540 nm.