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Effect of FPSS on σB activity by artificial induction. PB213 [Pspac (rsbV+ rsbWΔ1 sigB+ rsbX+) amyE::pDH32-ctc trpC2] was grown in BLB at 37°C with shaking (225 rpm). At an OD600 of 0.4 (time zero), 64 μM FPSS or DMSO and IPTG (final concentration, 1 mM) or distilled H2O were added. β-Galactosidase activities were determined for PB213 with H2O and DMSO (●), IPTG and DMSO (■), and IPTG and FPSS (◆). Results from a representative experiment are shown.
