FIG 2.

FlrA and FlhG regulate biofilm formation in a BpfA-dependent manner. (A) Biofilms formed by the wild type and mutants on the walls of glass tubes were quantified using a crystal violet assay after cells were grown in LB medium for 18 h. Images represent biofilms formed on glass walls. (B) Biofilms formed by the ΔflrA mutant and ΔflhG mutant complemented with flrA (pflrA) and flhG (pflhG), respectively. The wild type and ΔflrA and ΔflhG mutants were transformed with the empty vector. To all the samples, we added 0.5% l-arabinose. Error bars indicate standard deviations of results from three samples.