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Effect of chromosomal regulators on the expression of slrP. β-galactosidase assays were performed on log-phase cultures (using Beta-glo reagent). The results represent a mean of at least three independent assays. WT, wild type; invF, invF mutant; sicA, sicA mutant; sprB, sprB mutant, MM + pinvF-sicA, multi-mutant containing the plasmid encoding invF and sicA; MM + psprB, multi-mutant containing the plasmid encoding sprB.
