Journal of Lipid Research, Vol. 9, 730-732, November 1968
Copyright © 1968 by Lipid Research, Inc.

Structure and amount of positional isomers of monounsaturated fatty acids in human depot fat

Jürgen Jacob and Gernot Grimmer

University of Hamburg, Hamburg, Germany

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 C₁₀ to C₁₈ 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.

Supplementary key words decenoic • dodecenoic • tetradecenoic • biosynthesis

Submitted on December 4, 1967
Revised on April 24, 1968
Accepted on July 2, 1968

CiteULike    Complore    Connotea    Del.icio.us    Digg    Reddit    Technorati    What's this?