细胞分裂素-铜（II）配合物的超氧化物歧化酶样活性研究。

SOD-like activity studies of cytokinin-copper(II) complexes.

作者信息

Goldstein S, Czapski G

机构信息

Department of Physical Chemistry, Hebrew University of Jerusalem, Israel.

出版信息

Free Radic Res Commun. 1991;12-13 Pt 1:173-7. doi: 10.3109/10715769109145783.

DOI:10.3109/10715769109145783

PMID:1649086

Abstract

Using the pulse radiolysis technique it was shown that copper(II) complexes of kinetin and 6-benzylaminopurine (6-BAP) catalyze O2- dismutation very efficiently at physiological pH. The 'turnover' rate constants at pH 7 were determined to be (1.5 +/- 0.3) x 10(9) and (2.2 +/- 0.4) x 10(9) M-1s-1 for 6-BAP and kinetin, respectively. The system was studied at pH 3-10 in the case of 6-BAP, and the results show that this complex catalyzes also HO2 dismutation efficiently.

摘要

使用脉冲辐解技术表明，激动素和6-苄基氨基嘌呤（6-BAP）的铜（II）配合物在生理pH值下能非常有效地催化超氧阴离子（O2-）歧化反应。在pH 7时，6-BAP和激动素的“周转”速率常数分别测定为(1.5±0.3)×10^9和(2.2±0.4)×10^9 M-1s-1。对于6-BAP，在pH 3至10的范围内对该体系进行了研究，结果表明该配合物也能有效地催化过氧化氢自由基（HO2）歧化反应。