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Structures of Triglycerides of Bovine Milk Serum. Short Chain Triglycerides¹

University of Minnesota, The Hormel Institute, Austin

ABSTRACT

The structures of the triglycerides containing short chain fatty acids of bovine milk serum were determined by a combination of argentation-thin-layer and liquid-liquid partition chromatography. Some 168 different molecular species of triglycerides containing short chain acids were detected on the basis of a difference in degree of unsaturation or carbon number exclusive of positional isomers. All species present in amounts greater than the order of 0.01% were determined. The short chain fatty acids were widely distributed among the triglycerides, but significant amounts of triglycerides containing more than one short chain acid were detected. Although previous evidences for an interrelationship in the biosynthesis of triglycerides and lecithin were observed, comparison of the fatty acid and molecular species composition of the classes in milk serum in the present study did not reveal a direct relationship between the synthesis of these compounds.

¹ Supported in part by a grant from the Special Dairy Industries Board and PHS Research Grant no. HE-05735 from the National Institutes of Health, Public Health Service.