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Journal of Lipid Research, Vol. 3, 456-459, October 1962
Copyright © 1962 by Lipid Research, Inc.

The structure of plasmalogens: VI. Configuration of the double bond in the ,ßbeta;-unsaturated ether linkage of phosphatidal choline

William T. Norton , Eugene L. Gottfried , and Maurice M. Rapport

Departments of Biochemistry, Neurology, and Medicine, Albert Einstein College of Medicine, Yeshiva University, New York 61, N. Y.

The infrared spectrum of -1-alkenyl glyceryl ether, prepared from pure phosphatidal choline, shows a singlet at 6.00 µ (1667 cm^-1) and a band at 13.55 µ (738 cm^-1). These two bands disappear after hydrogenation of the unsaturated ether. No appreciable absorption at 10-11 µ (1000-910 cm^-1) was found. This evidence is consistent with the properties of cis- and not with those of trans-1-alkenyl alkyl ethers, and permits the assignment of the cis configuration to the double bond in the ,ßbeta;-unsaturated ether linkage.

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