FIG. 5.

Scanning confocal laser microscopic images of flow-cell-generated biofilms. (A and D) Wild-type W3110. (B and E) Isogenic lsrR mutant. (C and F) Isogenic lsrK mutant. We note that results for the lsrR mutant had a larger standard deviation than those for the lsrK mutant; the biofilm height was observed to fluctuate in the flow chamber (not shown here). A, B, and C are scanning confocal microscopic images; D, E, and F are reconstructed three-dimensional biofilm structures. The length scale is indicated by bars.