Journal of Lipid Research, Vol. 13, 390-395, May 1972
Copyright © 1972 by Lipid Research, Inc.

Isolation and identification of an alkyldiacylglycerol containing isovaleric acid

M. L. Blank , Kazuo Kasama , and Fred Snyder

Medical Division, Oak Ridge Associated Universities, Oak Ridge, Tennessee 37830

We have isolated and identified a unique subclass of alkyldiacylglycerols from the pink portion of the harderian gland of the New Zealand white rabbit. Using chemical, enzymic, chromatographic, and physical procedures, the lipid class has been identified as 1-alkyldiacylglycerol containing 1 mole of isovaleric acid. More than 50% of the O-alkyl moieties consist of 16:0 and 18:0 carbon chains, whereas the other major O-alkyl moieties are 15:0 and 17:0 branched chains (30%). The long-chain acyl groups of the alkyldiacylglycerol subclass consist primarily of saturated fatty acids (60% 16:0 and 30% 18:0) and a small amount of branched-chain fatty acids (5%), whereas the 3-position appears to be occupied by isovaleric acid.

Supplementary key words pink harderian gland • rabbit • glycerol ethers • short-chain fatty acids

Submitted on October 15, 1971
Accepted on January 31, 1972

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