Abstract
The lipid class and fatty acid composition of carp serum lipoproteins of a globulin fraction, as wel1 as carp serum albumin (CSA), were analyzed. The main Iipid classes of the lipoproteins were sterol esters and triglycerides; their sum amounted to 40-50% of the total. These lipoproteins differed from each other only slightly in lipid class composition, whereas they differed markedly in fatty acid composition. The fatty acid compositions of nonpolar lipids (sterol esters and wax esters), triglycerides, non-esterified fatty acids, paztial glycerides, and phospholipids separated from the lipid of CSA were examined. Saturated fatty acids were high in nonpolar lipids, and polyunsaturated fatty acids were characteristically distributed in partial glycerides and phospholipids. Significant diversities in lipid class and fatty acid composition were observed between the carp and the other animals, including fish. CSA has some similarity in chemical composition to both albumin and high density lipoprotein of mammalian serum. One of the lipoproteins was observed to disappear in the cold season, but the others did not show any significant seasonal variations.
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