FIG. 2.
RssAB and FlhDC are required for efficient biofilm attachment. Shown is the quantification of bacterial attachment efficacy by microtiter plate assay. The results were expressed as the A630. Expression of flhDC in S. marcescens CH-1/pFlhDC was induced by supplementation with 0.1% arabinose. All results are shown as the average of three independent experiments, with the standard deviation indicated by error bars. *, P < 0.05; **, P < 0.01; and ***, P < 0.001 in comparison to CH-1 (Student's t test).