Fig. 6

Tri-plot representation of the gut communities in the exploitation of three major energy sources (a) and the metabolism of short-chain fatty acids (b). For each metabolic category/trait (e.g. carbohydrate/lipid/amino acid degradation and propionate/butyrate/acetate metabolism), the abundance was defined as summed protein abundances of GMMs associated with the category divided by the number of GMMs in that category. Shown tri-plot representation is based on the relative abundance of the three defined categories. The dashed lines give an example of the proportions of carbohydrate, lipid and amino acid degradation for the sample DOL13 of infant 21. Each corner triangle labeled with one-letter category name (e.g. amino acid (A); lipid (L); carbohydrate (C); propionate (P); butyrate (B); acetate (A)) represents dominant proteomic investment in that particular metabolic category. Day of life (DOL) is shown on each sample/dot