食品科学 ›› 2008, Vol. 29 ›› Issue (5): 292-294.

• 生物工程 • 上一篇    下一篇

大豆酯酶的分离、纯化及性质研究

温艳霞, 兰文礼, 李建科   

  1. 银川大学石油化工学院; 宁夏丰友化工公司; 陕西师范大学食品工程系;
  • 出版日期:2008-05-15 发布日期:2011-08-26

Study on Purification and Properties of Soybean Esterase

 WEN  Yan-Xia, LAN  Wen-Li, LI  Jian-Ke   

  1. 1.Department of Petrochemical Engineering,Yinchuan University;2.Ningxia Fengyou Chemical Company;3.Department of Food Engineering,Shaanxi Normal University
  • Online:2008-05-15 Published:2011-08-26

摘要: 本实验研究了从大豆种子中分离、纯化大豆酯酶的方法,研究表明经过缓冲液提取、差速离心、盐析沉淀和离子交换层析可以得到电泳纯级的大豆酯酶。特性研究表明大豆酯酶的最适温度为30℃,最适pH值为7.5,其酯酶活力随离子强度的变化而变化,用双倒数法求的大豆中酯酶的米氏常数为2.97μmol/L。

关键词: 大豆酯酶, 分离纯化, 最适温度, 最适pH值, 米氏常数

Abstract: The purification method and properties of plant esterase(P-E) from soybean were studied.Results showed that the electrophoresis purity P-E can be obtained by extraction with phosphate buffer(0.3 mol/L,pH 7.0) extraction,differential centrifugation,ammonium sulfate deposition and ion-exchange chromatography.The optimal temperature,pH and Km of P-E were also determined respectively.

Key words: plant esterase, purification, optimal temperature, optimal pH, Michaelis constant