FIG. 4.

Abh activates slrR expression. Expression of P_slrR-gfp was measured after 18 h of incubation under biofilm formation conditions at 37°C for the “wild type” (′wt') (NRS2550), Δabh mutant (NRS2551), Δabh P_abh-abh mutant (NRS2553), Δabh P_IPTG-abh mutant (NRS2552), and degU mutant (NRS2716). Average fluorescence is shown in arbitrary units (AU). The level of IPTG added is shown below the bars (0 for 0 μM IPTG or 100 for 100 μM IPTG). The values show the means plus standard errors of the means (error bars) from at least three independent experiments.