Fig. 1: Overview of the metabolic pathways of fatty acids and some amino acids.
From: Chemoorganoautotrophic lifestyle of the anaerobic enrichment culture N47 growing on naphthalene
Thick red lines indicate adjacent 13C-atoms (e.g., 13C2 bodies, two labeled carbon atoms in the same molecule). Blue dots indicate 13C-atoms derived from 13CO2 (one labeled carbon atom). 13CO2 can react with 12CO2 in the WLP to form acetyl-CoA with a mass increase of one, marked with an asterisk *(C2 body, one labeled carbon atom). Due to the symmetry of succinate, it is not possible to observe if the label is on C1 and C2 or C3 and C4, respectively, which is indicated with a thinner red line and (*). 1: naphthalene, 2: acetyl-CoA, 3: exemplary fatty acid, 4: pyruvate, 5: alanine, 6: citrate, 7: 2-oxoglutarate, 8: glutamate, 9: succinate, 10: oxaloacetate, 11: aspartate.
