FIELD: biochemistry. SUBSTANCE: connective tissue of sturgeon fish is used as animal raw materials. Before grinding said raw materials are frozen Raw materials are treated by water within 1-2 h at ratio 1:(2-3), temperature being 60-80 C and then are cooled. The process is followed by extraction with alcohol at pH 3.0-3.5 at temperature 4-8 C. EFFECT: increases yield of phospholipids, decreases cholesterol content in desired product. 1 tbl
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