食品科学 ›› 2001, Vol. 22 ›› Issue (12): 29-31.

• 基础研究 • 上一篇    下一篇

苹果梨多酚氧化酶(PPO)的部分特性

 毕阳,  欧阳春光   

  1. 甘肃农业大学食品工程系; 甘肃省膜科学研究所
  • 出版日期:2001-12-15 发布日期:2012-02-14

Some Properties of Polyphenol Oxidase from Pinguli Pear

 BI  Yang,   欧Yang-Chun-Guang   

  • Online:2001-12-15 Published:2012-02-14

摘要:  苹果梨多酚氧化酶仅作用于邻苯酚,与对苯酚、间苯酚和一元酚无作用。以儿茶酚为底物,该酶的最适pH为6.5,在30℃下活性最强。除氯化钠和蔗糖外,供试的其它7种抑制剂均可不同程度地对该酶产生抑制,其中以焦亚硫酸钾效果最好。

关键词: 苹果梨, 多酚氧化酶, 特性

Abstract: Polyphenoloxidase in Pinguoli pear(Pyrus bretschneideri Rehder:Pinguoli)showed reaction with odiphenol,but not with hyroguinone,m-diphenol,and mono-phenol.Maximum PPO activities showed pH 6.5,and optimum temperature for maximum PPO activity was 30℃ with catechol as a substrate.The enzyme was relatively sensitive to most inhibiors tested with the exception of NaCl and sucrose.Potassium pyrasufite was the most effective inhibitor.

Key words: Pinguoli pear Polyphenoloxidase Property