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Journal of Lipid Research, Vol. 9, 65-67, January 1968
Copyright © 1968 by Lipid Research, Inc.

Positional distribution of fatty acids in glycerophosphatides of bovine gray matter

Hyakuji Yabuuchi and John S. O'Brien

Department of Pathology, University of Southern California School of Medicine, Los Angeles, California 90033

Glycerophosphatides were isolated from ox brain gray matter by column chromatography. The fatty acid compositions of ethanolamine glycerophosphatides (EGP), serine glycerophosphatides (SGP), and choline glycerophosphatides (CGP) were determined by gas-liquid chromatography. The positional distribution of fatty acids in these glycerophosphatides were determined by phospholipase A hydrolysis (Habu habu venom). C₂₀ and C₂₂ polyunsaturated acids were confined almost exclusively to the 2-position of these lipids, where they comprised the majority of 2-substituents in EGP and SGP (oleic acid predominated in this position in CGP). In the 1-position, palmitoyl was the major substituent in CGP, stearoyl in SGP, and stearoyl or the corresponding alk-1-enyl group in EGP.

Supplementary key words bovine brain • gray matter • glycerophosphatides • fatty acids • positional distribution • predominant species of phospholipid

Submitted on July 25, 1967
Accepted on October 16, 1967

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