Journal of Lipid Research, Vol. 3, 344-350, July 1962
Copyright © 1962 by Lipid Research, Inc.
Polyunsaturated fatty acids in mitochondria
T. Richardson , A. L. Tappel , L. M. Smith , and C. R. Houle
Department of Food Science and Technology, University of California, Davis, California and Bureau of Commercial Fisheries, Technological Laboratory, Seattle, Washington
Fatty acids of mitochrondria from hearts and livers of fresh-water and marine fish, marine birds, fur seal, and from sweet potato have been analyzed by gas-liquid chromatography. Cytochrome patterns, determined from difference spectra, were similar for all animal species; the quantities of cytochromes varied slightly, heart mitochondria yielding higher values than the liver mitochondria in each species. Fish mitochondria showed a slightly lower cytochrome content than bird and mammalian mitochondria, while sweet potato particles contained very little cytochrome. Fatty acid patterns and degree of unsaturation were similar in mitochondria from fish and from fish-eating birds and seals. Major differences found in fatty acid patterns included: absence of detectable linoleic acid in liver mitochondria from sturgeon and flounder; absence of detectable arachidonic acid in mitochondria from sweet potato; a four-fold greater percentage of stearic acid and a four-fold greater percentage of combined linoleic-arachidonic acids in bird and seal mitochondria compared with those found in fish mitochondria; high levels of the linolenate family of acids in fish mitochondria and intermediate levels in marine bird and seal mitochondria as compared to the high levels of the linoleate family of acids that have been found in rat liver, chicken liver, and beef heart mitochondria.
Submitted on September 19, 1961
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