Figure 6.

Compound exchange at t = 0.1 h for the syntrophic co-culture (A) and the simplified human gut microbiome (B). Microbial species (blue circles) produce and consume compounds (yellow diamonds) as indicated by arrows. Numbers indicate production and consumption rates (in mM/h). In (B), only those compounds are shown, which are both produced and consumed by at least one microbial species, and fluxes below 0.01 mM/h as well as compounds H₂O and proton were omitted for clarity. Abbreviated compound names refer to: ac: acetate, CO2: carbon dioxide, cys_L: L-cysteine, dad_2: 2-deoxyadenosine, etoh: ethanol, for: formate, gln_L: L-glutamine, glu_L: L-glutamate(1-), gly: glycine, gua: guanine, h2/H2: hydrogen, h2s: hydrogen sulfide, nac: nicotinate, no2: nitrite, phe_L: L-phenylalanine, ser_L: L-serine, succ: succinate.