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. 2022 Jun 20;7(7):986–1000. doi: 10.1038/s41564-022-01152-6

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© The Author(s) 2022

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Extended Data Fig. 9 — (A) LC-MS/MS fragmentation patterns of lipids extracted from Novosphingobium acidiphilum consistent with the synthesis of PI-DHC 35:0 and 36:0. (B) LC-MS/MS fragmentation pattern of lipids extracted from Sphingomonas paucimobilis, demonstrating the presence of a headgroup with the same mass as inositol phosphate (259) but lacking the characteristic fragment of this group (241). As such, the headgroup identity remains tentative and is represented with a phosphohexose. (C) LC-MS/MS spectra and fragmentation pattern of a P(Glycerol)-DHC 36:0 structure present in Prevotella copri, Porphyromonas gingivalis, and Bacteroides vulgatus. Branching patterns and acyl chain distribution of lipid structures shown are possible representative structures and are not confirmed.