title: A new series of long-chain dicarboxylic acids with vicinal dimethyl branching found as major components of the lipids of Butyrivibrio spp.
abstract: 1. Some members of the genus Butyrivibrio, including a general fatty acid auxotroph (strain S2), contain as a major part of their complex lipids a high-molecular-weight component that is probably formed by the union of two fatty acid chains [Hazlewood & Dawson (1979) J. Gen. Microbiol. 112, 15--27]. 2. Proton and 13C n.m.r. and i.r. and mass spectroscopy were used to examine a homologous series of these moieties and, in addition, the hydrocarbon derivative of one homologue and several synthetic compounds. 3. The results indicate that the high-molecular-weight components are a series of long-chain dicarboxylic acids containing vicinal dimethyl branching, located near the centre of the chain.
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D003998:Dicarboxylic Acids / Q000032:analysis*; D005227:Fatty Acids / Q000378:metabolism; D006089:Gram-Negative Anaerobic Bacteria / Q000032:analysis* / Q000378:metabolism; D008055:Lipids; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D013055:Spectrophotometry, Infrared; D009626:Terminology as Topic
chemical_list: D003998:Dicarboxylic Acids; D005227:Fatty Acids; D008055:Lipids