title: Bacterial triterpenoids.
mesh_terms: D001419:Bacteria / Q000032:analysis*; D018407:Bacterial Physiological Phenomena; D005075:Biological Evolution; D002338:Carotenoids / Q000502:physiology; D002462:Cell Membrane / Q000502:physiology; D008563:Membrane Lipids / Q000502:physiology; D013045:Species Specificity; D013329:Structure-Activity Relationship; D014315:Triterpenes / Q000096:biosynthesis / Q000502:physiology*
chemical_list: D008563:Membrane Lipids; D014315:Triterpenes; D002338:Carotenoids