| abstract |
(57) [Summary] [Problem] To efficiently extract scallop oil from scallop and obtain an oil containing a highly unsaturated fatty acid having a high eicosapentaenoic acid content and a low arachidonic acid content, and obtaining eicosapentaenoic acid or an ester thereof. Provide a method of serving as a raw material. Kind Code: A1 A protease is applied to the scallop midgut gland to separate and collect the released oil containing polyunsaturated fatty acids, and then purified by a step including a degumming step, a deacidification step, and a decolorization step to obtain a scallop. A method for producing intestinal gland oil. The scallop midgut gland oil obtained by the above method is subjected to ethyl esterification or methyl esterification and purified by a step including a urea addition fractionation step. Its fatty acid composition is eicosapentaenoic acid of 60% or more and arachidonic acid. A method for producing a highly unsaturated fatty acid-containing oil that is less than 0%. |