| PMC full text: | Nature. Author manuscript; available in PMC 2018 Feb 28. Published in final edited form as:
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Extended Data Fig 9
Detection of N-acyl amides in human fecal samples
High-resolution reversed-phase LC-MS analysis of human fecal extract pooled from 128 samples representing 21 individuals. Extracted ion chromatograms for individual N-acyl amides are shown within a 2 ppm tolerance of the exact mass (M+H). Compounds observed to be present in the human fecal extract were confirmed by alignment to authentic standards (top panel), and by spiked addition of the pure compound (data not shown). No zwitterionic N-acyl amides (N-acyl or N-acyloxyacyl ornithine/lysines) were detected.
