Fig. 2

Global differences within metabolic models and their most divergent reactions. Biplot of the principle coordinate analysis based on the metabolic distance determined by the presence/absence of specific reactions in the metabolic models. Taxonomic groups are represented by different colors. The 200 reactions most associated with the point separation are indicated as arrows pointing from the coordinate origin to the contributing direction. The arrow shading represents reactions overlapping in their direction of contribution. The complete set of 2272 reactions sorted by their relevance can be found in Additional file 4: Table S3