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Tissue fatty acid composition in four diverse vertebrate species

1968; Pergamon Press; Volume: 26; Issue: 1 Linguagem: Inglês

10.1016/0010-406x(68)90326-5

1879-3029

Gary Frederick Mcmullin, Samuel C. Smith, Paul A. Wright,

Pharmacological Effects and Assays

1. Fatty acids of seven tissues from the mouse (Mus musculus), quail (Coturnix coturnix japonica), bullfrog (Rana clamitans), and sunfish (Lepomis gibbosus) were analyzed by gas-liquid chromatography. Twenty-seven fatty acids were separated as their methyl esters and identified. 2. A higher degree of unsaturation was found in all tissues from the aquatic species (bullfrog and sunfish) than in those from terrestrial species (mouse and quail). 3. High levels of 22:6 were found in tissues which are metabolically active in energy production, particularly in mouse heart, where it comprised approximately one-third of the fatty acids present. 4. Brain fatty acid composition was similar in all four species, indicating a tissue specificity; whereas, the distribution of testicular fatty acids, particularly the C22 series, suggested a species specify. The predominance of 18:1 in depot fat confirmed that this fatty acid is the preferred form of reserve energy storage in animals. 5. Branched-chain fatty acids were found in all tissues analyzed.