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亚硒酸盐的酶促还原

ENZYMATIC REDUCTION OF SELENITE.

作者信息

NICKERSON W J, FALCONE G

出版信息

J Bacteriol. 1963 Apr;85(4):763-71. doi: 10.1128/jb.85.4.763-771.1963.

Abstract

Nickerson, Walter J. (Rutgers, The State University, New Brunswick, N.J.) and Giuseppe Falcone. Enzymatic reduction of selenite. J. Bacteriol. 85:763-771.-1963. Extraction of boiled yeast extract with n-hexane removed its ability to restore selenite-reducing capacity in dialyzed enzyme preparations obtained from baker's yeast or from Candida albicans. Menadione or thiodione substituted for the quinone(s) extracted by n-hexane. Active components of the water-soluble, dialyzable fraction of yeast extract included: glucose-6-phosphate, triphosphopyridine nucleotide, and glutathione. Selenite appears to be bound to protein through vicinal thiol groups, and to be released therefrom as metallic selenium after accepting four electrons.

摘要

尼克森,沃尔特·J.(罗格斯大学,新泽西州立大学,新不伦瑞克)和朱塞佩·法尔科内。亚硒酸盐的酶促还原。《细菌学杂志》85:763 - 771。- 1963年。用正己烷萃取煮沸的酵母提取物后,它失去了恢复从面包酵母或白色念珠菌获得的透析酶制剂中亚硒酸盐还原能力的能力。甲萘醌或硫代二酮替代了被正己烷萃取的醌类物质。酵母提取物水溶性、可透析部分的活性成分包括:6 - 磷酸葡萄糖、三磷酸吡啶核苷酸和谷胱甘肽。亚硒酸盐似乎通过邻位巯基与蛋白质结合,并在接受四个电子后以金属硒的形式从蛋白质中释放出来。

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