Fig. 2

Principal component analysis of lipid types identified using LC/MS. a Principal component analysis (PCA) of all identified lipids. b PCA of mycolic acid species. c PCA of triacylglycerol species. d PCA of phospholipid species. Because triacylglycerol ion counts are > 98% of total ion counts in each sample, the PCA plots for all lipid species (a) and triacylglycerol species (c) are almost identical. Each point represents one replicate. WTG WT strain grown in 1 g/L glucose, 40G evol40 grown in 1 g/L glucose, WTLP WT strain grown in 0.75 g/L phenol, 40LP evol40 strain grown in 0.75 g/L phenol, 40HP evol40 strain grown in 1.5 g/L phenol, PC1 1st principal component, PC2 2nd principal component. Percent represents the amount of variance explained by each principal component.