To simply and efficiently obtain structural oils and fats containing a highly unsaturated fatty acid in a high concentration at the 2-position of triglyceride.
In a first-stage reaction, glycerol and a highly unsaturated fatty acid or its lower alcohol ester are treated with a lipase having no regiospecificity to synthesize a highly unsaturated fatty acid triglyceride while dehydrating. In a second-stage reaction, the highly unsaturated fatty acid triglyceride and a ≤12C fatty acid or its lower alcohol ester are treated with a lipase specifically acting on the 1,3-positions of the triglyceride to produce the objective structural oils and fats in which the number of carbons of fatty acids bonded to the 1,3-positions of the triglyceride is ≤12 and ≥90% composition of the fatty acid bonded to the 2-position is the highly unsaturated fatty acid. In the second-stage reaction, the hydration is carried out after the reaction is advanced in a certain degree. The highly unsaturated fatty acid is any of α-linolenic acid, γ-linolenic acid, arachidonic acid, eicosapentaenoic acid, n-6- based docosapentaenoic acid and docosahexaenoic acid.
IWASAKI YUGO
ROCHAT ROXANNA
SHIMIZU NOBUHISA
OKITA YUJI
