FIG 5.

Fatty acid profiles of wild-type P. aeruginosa (filled symbols) and lasI rhlI mutant (open symbols) cells as determined by fatty acid methyl esterification (FAME) and subsequent GC-MS analysis. (a) Saturated fatty acids (circles), cis-unsaturated fatty acids (squares), and cyclopropane fatty acids (diamonds) in the wild type. (b) Cyclopropane fatty acids (CPFAs). (c) The average carbon chain length (ACCL) of fatty acids. Data are presented as means ± standard deviations for six biological replicates. Values that are significantly different by two-tailed Student's t test are indicated by asterisks as follows: *, P ≤ 0.05; **, P ≤ 0.01. The data in the figure are based on data presented in Table 2.