FIG 6 .

Effects of CsrA binding site mutations (BS1, BS2, BS3, and BS4) on expression of P1-P2-iraD'-'lacZ and P2-iraD'-'lacZ translational fusions. (A and B) β-Galactosidase activities (Miller units) ± standard deviations were determined in exponential-phase (exp), stationary-phase (stat), and overnight (o/n) cultures. Experiments were performed at least three times. (A) Wild-type (WT) and mutant fusions containing the indicated changes in BS1, BS2, BS3, and BS4. (B) WT and mutant fusions containing the indicated changes in BS1, BS3, and BS4 to emphasize small differences caused by these mutations.