FIG 2.

Expression of attachment genes by a quorum-sensing mutant relative to the level of expression by the wild-type strain (C7184). Error bars represent the standard errors from two biological and three technical replicates. The luxS mutant intrinsically expresses significantly higher levels of pilA and pilD than the wild-type strain. Asterisks represent statistically significant differences between the luxS mutant and the C-genotype parental strain for each gene of interest by using a one-way ANOVA. ****, P < 0.0001; *, P < 0.05.