FIG 4.
(A) RseA/σE-mediated control yfgC::lacZ expression. β-Galactosidase activities were measured from mid-log-phase-grown cultures. Expression of the plasmid-borne rseA gene was induced for 3 h with 0.2% arabinose. (B) Effects of degS suppressor mutations on σE activation were assessed by examining activities of the σE-regulated yfgC::lacZ fusion construct (yfgC is also known as bepA). β-Galactosidase assays were carried out from three independent cultures, grown to various growth phases as shown, in duplicate. Error bars indicate SDs.