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Formate bound to cytochrome oxidase can be removed by cyanide and by reduction.

作者信息

Chang K T, Palmer G

机构信息

Department of Biochemistry and Cell Biology Rice University, Houston, TX 77005-1892, USA.

出版信息

Biochim Biophys Acta. 1996 Dec 18;1277(3):237-42. doi: 10.1016/s0005-2728(96)00105-3.

DOI:10.1016/s0005-2728(96)00105-3
PMID:8982389
Abstract

Using 14C-radiolabeled formate we have found that the rapid form of oxidized cytochrome oxidase can bind up to 1 mol of formate. Treatment of this formate-ligated enzyme with excess cyanide releases 97% of the radiolabel while reduction of formate-labeled enzyme with NADH+ruthenium releases 80-85% of the radioactivity. These data are most simply interpreted by assuming that formate binds to the heme iron of cytochrome a3.

摘要

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