PROBLEM TO BE SOLVED: To provide a method for producing oil and fat containing oil and fat having a high melting point of 50°C or higher in a starting material and performing 1,3-position specific transesterification by an enzyme, capable of keeping the isomerization rate the fatty acid composition at the 2-position low even by using an inexpensive enzyme, and also having a short production time.SOLUTION: This method for producing the oils and fats includes (1) a step for preparing (A) the oils and fats having a melting point of 50°C or higher, and (2) a step of performing the 1,3-position specific enzymatic transesterification by using (B) oils and fats having triglyceride in which 40 wt.% or more of the amount of the contained saturated fatty acid is bonded at the 2-position and (A) the oils and fats, or by using (C) oils and fats having triglyceride in which 40 wt.% or more of the amount of the contained unsaturated fatty acid is bonded at the 2-position and (A) the oils and fats, and in the step (1), (a) oils and fats having a melting point of 50°C or more is contained as the starting raw material.COPYRIGHT: (C)2009,JPO&INPIT【課題】出発原料に50℃以上の高い融点を持つ油脂を含み、酵素による1、3位特異的なエステル交換を行う油脂の製造において、安価な酵素を用いても、2位の脂肪酸組成の異性化率を低く保ち、しかも製造時間が短かい方法を提供する。【解決手段】融点が50℃以下の油脂(A)を作製する工程(1)と、含有飽和脂肪酸量の40重量%以上が2位に結合しているトリグリセリドからなる油脂(B)及び油脂(A)、又は、含有不飽和脂肪酸量の40重量%以上が2位に結合しているトリグリセリドからなる油脂(C)及び油脂(A)を用いて1、3位特異的に酵素エステル交換する工程(2)を有する油脂の製造方法であって、工程(1)は、融点が50℃以上の油脂(a)を出発原料として含むことを特徴とする油脂の製造方法である。【選択図】なし
