Figure 4.

Heat map based on mass spectrometry data displaying distinct metabolic profiles amongst the 77 bacterial species: (a) dendrogram from multivariate analysis overlaid with heat map; and (b) heat map organized according to species showing differences in the chemical profiles of strains and species. Species observed as outliers from PCA are highlighted and labelled using an asterisk*. (Abbreviations; UBC= uncultured bacterial clone, UGP clone = uncultured gamma proteobacterium, UMB = uncultured marine bacterium).