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. 2018 Aug 17;9:3294. doi: 10.1038/s41467-018-05470-4

Fig. 2.

Fig. 2

Microbial generation of tryptophan catabolites in the human gut. Overview of the different ways microbes degrade tryptophan in the human gut. The metabolites that are most often found in the human gut are colored in green. Dashed lines represent pathways where no enzymes have been identified