Strains representing the mycolic acid-containing taxa , and the “rhodochrous” complex were analysed for polar lipids by two-dimensional, thin-layer chromatography; diphosphatidylglycerol and phosphatidylinositol were found in all strains and phosphatidylethanolamine was absent only in extracts of and . Mono- and diacyl phosphatidylinositol dimannosides were present in all , and rhodochrous strains and in the single strain of examined; and strains of the other species had only a monoacyl phosphatidylinositol dimannoside. Phosphatidylglycerol was present in substantial amounts in extracts of two strains of and in reduced proportions in strains of several other species. Unidentified glycolipids were detected in the lipids of a majority of the organisms investigated.


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