食品科学 ›› 2003, Vol. 24 ›› Issue (4): 55-58.

• 基础研究 • 上一篇    下一篇

高灌蓝越橘多酚氧化酶的动力学研究

 杨萌, B.Rovel, M..Metche   

  1. 江南大学食品学院,法国国立洛林理工学院应用生物化学实验室
  • 出版日期:2003-04-15 发布日期:2011-12-13

Enzymatic Kinetics Study on Polyphenol Oxidase of Highbush Blueberry

 YANG  Meng, B.Rovel , M..Metche   

  • Online:2003-04-15 Published:2011-12-13

摘要: 采用紫外区域内对底物的扫瞄法研究了高灌蓝越橘(VaccyniumcorybosumL.)多酚氧化酶的底物专一性,用紫外分光光度法和极谱测氧消耗法对酶的动力学进行了研究,测定了相应的米氏常数。用二类抑制剂研究抑制剂浓度对抑制剂效果的影响以及抑制剂与酶结合不同时间对抑制效果的影响,从而对高灌蓝越橘多酚氧化酶进行了抑制研究。

关键词: 多酚氧化酶(PPO), 专一性, 动力学, 米氏常数, 抑制剂

Abstract: The substrate specificity of highbush blueberry polyphenol (Vaccyn iu m corybosum L.) oxidase has been studied by a substrate scanning method in spec trophotometric range. The enzymeatic kinetics has been investigated by using th e spectrophotometric method and poloragraphe method. Michaelis-constant(Km) has been assayed. The kinds of inhibitors and the effects of inhibitor concentrati o n and of combination time of inhibitor and enzyme on the inhibition of PPO hav e also been stadied.

Key words: PPO, substrate specificity, kinetics of enzyme, Michaelis-constant, inhib itor