title: Structure and amount of positional isomers of monounsaturated fatty acids in human depot fat.
abstract: Positional isomers of decenoic, dodecenoic, and tetradecenoic acids of human adipose tissue have been separated by gas-liquid chromatography and their amounts determined by oxidative cleavage. The following acids have been shown to be present: 7-decenoic, 8-decenoic, 9-decenoic, 7-, 8-, and 9-dodecenoic, and 7-, 8-, 9-, and 11-tetradecenoic acids. Among all isomers of the even-numbered acids from C(10) to C(18) the cis-9-isomer predominates. With increasing chain length, however, the content of 9-isomer decreases and the number of isomers increases. No 3- or 5-enoic acids could be detected. The origin and biosynthesis of all isomers are discussed.
mesh_terms: D000273:Adipose Tissue / Q000032:analysis*; D000368:Aged; D000475:Alkenes; D055598:Chemical Phenomena; D002621:Chemistry; D002849:Chromatography, Gas; D005227:Fatty Acids / Q000032:analysis*; D005260:Female; D006801:Humans; D010504:Periodic Acid
chemical_list: D000475:Alkenes; D005227:Fatty Acids; D010504:Periodic Acid