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The regulation of DosD on the expression of the bpfA operon was dependent on FlrA. The β-galactosidase activities in overnight cultures of the wild type (3591Z), 3591Z ΔdosD, 3591Z ΔflrA, and 3591Z ΔflrA ΔdosD were measured to evaluate the expression of the bpfA operon. Error bars indicate standard deviations from three samples. *, significantly different [P < 0.05]; ns, not significantly different.
