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Fatty acid composition analysis. Total fatty acid composition analysis for the PA14 wild-type (WT) strain and the ΔsigX mutant as the percentage of the area of total fatty acids from extracts cultivated under different osmolarities. Data represent the mean values of three biological replicates, with error bars indicating the standard deviations. Levels of statistical significance were calculated using a two-tailed unpaired t test (***, P < 0.001; **, P < 0.01).
