Figure 4

Expression of rap is activated following mutation of the pstSCAB operon. β-Galactosidase activity was assayed throughout growth from a chromosomal rap::lacZ fusion in (A) an otherwise WT background (RAPL;diamonds and open bars) or a pstS mutant background (PCF45; squares and solid bars), or (B) a smaI (ISRL;diamonds and open bars) or pstC, smaI (TG71; squares and solid bars) mutant background. In both graphs, bars represent β-galactosidase assays and dashed lines represent bacterial growth.