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Functionally related P. aeruginosa strains are metabolically similar. A, principal component analysis score plot of all strains, PCs 1 and 2. Different colors represent different mutant strains, and the lines connect individual points to strain centroids. B, linear discriminant analysis of dimension-reduced data (PCs 2–10 inclusive). Ellipses represent 95% confidence intervals for strains. C, hierarchical cluster analysis of mean concentrations for two-component system mutants.
