The Kinetics Study on Dismutation of Superoxide Catalyzed by Cu(Ser)2and Cu(Gly-Gly)2by Using Stopped-flow Method

Chem. J. Chinese Universities ›› 1998, Vol. 19 ›› Issue (8): 1288.

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The Kinetics Study on Dismutation of Superoxide Catalyzed by Cu(Ser)₂and Cu(Gly-Gly)₂by Using Stopped-flow Method

XIE Ying¹, JIN Qiu¹, LI Da-Zhen¹, GAO Pan-Liang², ZI Jun-Qing³

1. Deparment of Chemistry, Beijing Normal University, Beijing, 100875;
2. Dept. of Chem., Peking Univ., Beijing, 100871;
3. Dept. of Chem., Dali Normal School, Dali, 671000

Received:1997-05-27 Online:1998-08-24 Published:1998-08-24

Abstract

Abstract: In order to estimate the activities of natural SOD and the analogue of SOD on dynamics, the kinetics of Cu(Ser)₂and Cu(Gly-Gly)₂catalyzed the dismutation of superoxide were studied at pH=7.8 by using stopped-flow method. The rate constants k_cat, reaction order n, activation energy E_aand Arrhenius equation were obtained. the reaction mechanism was probed, and it was proved that the first step of the reaction was the determining step.

Key words: Superoxide anion(O₂^·-), Analogue of SOD, Stopped-flow method, Catalytic mechanism

CLC Number:

O641.4

TrendMD:

XIE Ying, JIN Qiu, LI Da-Zhen, GAO Pan-Liang, ZI Jun-Qing. The Kinetics Study on Dismutation of Superoxide Catalyzed by Cu(Ser)₂and Cu(Gly-Gly)₂by Using Stopped-flow Method[J]. Chem. J. Chinese Universities, 1998, 19(8): 1288.

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The Kinetics Study on Dismutation of Superoxide Catalyzed by Cu(Ser)₂and Cu(Gly-Gly)₂by Using Stopped-flow Method

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