中华寿桃多酚氧化酶的特性研究

doi:10.3864/j.issn.0578-1752.2008.03.022

Scientia Agricultura Sinica ›› 2008, Vol. 41 ›› Issue (3): 795-799 .doi: 10.3864/j.issn.0578-1752.2008.03.022

• STORAGE·FRESH-KEEPING·PROCESSING • Previous Articles Next Articles

Properties of Polyphenol Oxidase extracted from ‘zhonghuashoutao’ Peach Flesh

Yu-Quan DUAN Wei DONG Ming-Jing ZHANG Shuang-Qing FENG Yu-Mei ZHAO

中国农业科学院农产品加工研究所

Received:2007-03-13 Revised:2007-05-04 Online:2008-03-10 Published:2008-03-10

Abstract

Abstract: Polyphenol oxidase purified from ‘ZHONGHUASHOUTAO’ peach flesh showed the protein as a single polypeptide with a molecular weight of about 66.0kD. The optimum pH for PPO activity was 6.5 with catechol. The enzyme was relatively temperature stable with maximum activity at 60℃. Chlorogenic acid, catechol, and p-hydroxybenzyl acid were good substrates for the enzyme. FeSO4, EDTA, and Vc markedly inhibited PPO activity, whereas CaCl2, CuSO4 and MnSO4 enhanced PPO activity.

Key words: Peach Flesh, Polyphenol Oxidase, Properties

Yu-Quan DUAN Wei DONG Ming-Jing ZHANG Shuang-Qing FENG Yu-Mei ZHAO. Properties of Polyphenol Oxidase extracted from ‘zhonghuashoutao’ Peach Flesh[J].Scientia Agricultura Sinica, 2008, 41(3): 795-799 .

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