Peculiarities of the phospholipid and fatty acid composition of erythrocyte plasma membranes of the black sea fish |
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Authors: | Email author" target="_blank">Yu?A?SilkinEmail author E?N?Silkina S?A?Zabelinskii |
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Institution: | 1.Karadag Nature Reserve,National Academy of Sciences of Ukraine,Feodosia,Ukraine;2.Sechenov Institute of Evolutionary Physiology and Biochemistry,Russian Academy of Sciences,St. Petersburg,Russia |
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Abstract: | The phospholipid and the fatty acid composition of the main phospholipid families of erythrocyte plasma membranes was studied
in two species of cartilaginous fish: the common thrasher (Raja clavata L.) and the common stingray (Dasyatis pastinaca) and in three bony fish species: the scorpion fish (Scorpaena porcus L.), the smarida (Spicara flexuosa Raf.), and the horse mackerel (Trachurus mediterraneus ponticus Aleev). It was shown that in the studied fish, 70.0–80.0% of all membrane phospholipids were composed of phosphatidylcholine
and phosphatidylethanolamine. Phosphatidylserine, monophosphoinositide, and sphingomyelin were minor components whose content
in the erythrocyte membrane fluctuated from 3.0% to 13.0%. The fatty acid phospholipids composition was represented by a large
specter of acids. From saturated acids, basic for plasma membranes are palmitic (C16: 0) and stearic (C18: 0) acids. From
unsaturated acids, the larger part belongs to mono-, tetra-, penta-, and hexaenoic acids in fish phospholipids. The calculation
of the double bond index and of the unsaturation coefficient showed difference in the deformation ability of erythrocyte membranes
of the studied fish. |
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