FIG 4.

Biofilm formation of complemented transposon mutant strains. Biofilm formation of isogenic JE2 transposon mutants after complementation with the corresponding gene or a control vector expressing GFP. Results are normalized to biofilm production of the parental JE2 strain carrying the control vector (red line). Error bars indicate standard deviation from at least four separate measurements. * indicates a P value of <0.05 and ** indicates a P value of <0.01 by two-tailed t test against the parental strain (displayed above each bar plot) or for the indicated comparisons between transposon mutants carrying control or complementation vectors (black lines).