Patent ID: 7767427

Claim:
A production method of an oil or fat containing triglycerides in which medium-chain fatty acids are bound to the 1- and 3-positions of the triglycerides and a polyunsaturated fatty acid is bound to the 2-position comprising: allowing lipase that specifically acts on ester bonds at the 1,3-positions of triglycerides to act on a mixture of medium-chain fatty acids and a raw material oil or fat containing at least one polyunsaturated fatty acid; wherein the polyunsaturated fatty acid is selected from the group consisting of ω6 series polyunsaturated fatty acid having 18 or more carbon atoms and 3 or more double bonds and ω9 series polyunsaturated fatty acid having 18 or more carbon atoms and 2 or more double bonds, but not containing ω3 series polyunsaturated fatty acid; wherein, said lipase is used that has been immobilized on an ion exchange resin support that is porous and has a pore size of about 100 Angstroms or more, wherein the immobilized lipase is allowed to act at a reaction temperature of 40° C. or higher; and wherein the reaction is continuous.