食品科学 ›› 1993, Vol. 14 ›› Issue (3): 3-7.

• 食品科学 •    下一篇

胰蛋白酶在合成高分子阴离子交换树脂上的固定化作用

白虹,  葛世军   

  1.  北京大学分校; 北京大学
  • 出版日期:1993-03-15 发布日期:2011-12-29

Immobilization of Trypsin on the Anion Exchange Resin

 BAI  Hong,   Ge-Shi-Jun   

  • Online:1993-03-15 Published:2011-12-29

摘要:  研究了胰蛋白酶在合成高分子聚苯乙烯阴离子交换树脂上的固定化技术,固定化酶的动力学性质以及稳定性特征。阴离子交换树指GM201经预处理除去杂质后与偶联剂成二醛反应,再与胰蛋白酶反应,可把酶固定化在载体上。动力学分析表明:固定化胰蛋白酶的K_m(米氏常数)值高于溶液酶,最适温度及最适pH值均有较大变化。稳定性试验表明:固定化酶的热稳定性低于溶液酶,在微酸性,中性及碱性介质中的稳定性高于溶液酶。用固定化胰蛋白酶水解酪蛋白及提取大豆胰蛋白酶抑制剂的试验结果表明,固定化酶具有良好的操作稳定性。

关键词: 胰蛋白酶, 固定化胰蛋白酶, 蛋白质水解

Abstract:  The immobilizatin of trypsin, the kinetics and stability of the immobilized enzyme were studied. After removing the impurity, the anion exchange resin GM 201 was firstly treated with glutaraldehyde, then reacted with trypsin, and the trypsin was immobilized on the matrix. The Km value, obtained by kinetical study, of the immobilized trypsin was higher than that of trypsin, and the optimum pH value and the optimum temperature of the immobiliized enzyme were also changed. The heat stability of the immobilized enzyme is slightly decreased, but the storage stability of the immobilized enzyme in solutions from slightly acidic to basic were higher than that of soluble enzyme. Operational stability test showed that the immobilized trypsin was stable for casein hydrolysis and affinity chromatography of soybean trysin inhibitors.

Key words: Trypsin Immobilized trypsin Protein hydrolysis