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rcsB represses biofilms. In vitro biofilms were grown in the ΔrcsB strain transformed with vector control (white) or rcsB (black) under an arabinose-inducible promoter. Inducer was added at indicated concentrations. Data are mean ± SD of two (vector) or three (rcsB) trials. The difference between control and rcsB samples in the absence of arabinose is apparently due to basal rcsB expression.
