食品科学 ›› 2004, Vol. 25 ›› Issue (9): 71-74.

• 基础研究 • 上一篇    下一篇

猪肺血管紧张素转化酶的提取纯化及其性质研究

 吴琼英, 马海乐, 崔恒林, 吴守一   

  1. 江苏大学生物与环境工程学院
  • 出版日期:2004-09-15 发布日期:2011-10-24

Study on Extraction and Characteristics of Angiotensin Converting Enzyme-ACE of Fresh Hog Lung

 WU  Qiong-Ying, MA  Hai-Le, CUI  Heng-Lin, WU  Shou-Yi   

  1. College of Biology and Environment Engineering, Jiangsu University
  • Online:2004-09-15 Published:2011-10-24

摘要: 新鲜猪肺均浆离心后,经35%~55%饱和度的硫酸铵分级沉淀、Sephadex G-100凝胶柱层析、DEAESephadex A-50阴离子交换后,得到经SDS-PAGE显示为一条带的ACE纯品。200g猪肺可制备出ACE347.09U,比活力29.029U/mg,活力回收12.53%。用双倒数作图法得出ACE的酶反应动力学常数Km为3.168mmol/L,Vmax为6.165nmol/min。两个月的保藏后,试验证明所提酶活力保持稳定。

关键词: 猪肺, 血管紧张素转化酶, 凝胶过滤, 阴离子交换

Abstract: The fresh hog lung was homogenated and centrifugated with 35%~55% saturation ammonium sulfate fraction. Thenby using of Sephadex G-100 gel filtration and DEAE Sephadex A-50 anion exchange chromatogram column, pure ACE (Angio-tensin I-Converting Enzyme) showed as a single band by SDS-PAGE test and gave an apparent molecular weight about 185kD.The result was 347.09U ACE was obtained from 200g hog lung tissue with specific activity 29.029U/mg and activity recovery12.53%. Using Lineweaver-Burk method, the Michaelis-constant of hog lung ACE was 3.168mmol/L and Vmax 6.165nmol/min.After two months conserving, the test proved that the activity of the ACE was kept steady.

Key words: hog lung, angiotensin converting enzyme, gel filtration, anion exchange