Manganese(III) Biliverdin IX Dimethyl Ester: A Powerful Catalytic Scavenger of Superoxide Employing the Mn(III)/Mn(IV) Redox Couple
作者:Ivan Spasojević、Ines Batinić-Haberle、Robert D. Stevens、Peter Hambright、Arthur N. Thorpe、Jan Grodkowski、Pedatsur Neta、Irwin Fridovich
DOI:10.1021/ic0004986
日期:2001.2.1
cycling of the manganese in aqueous medium was found to be at E1/2 = +0.45 V vs NHE. This potential allows the Mn(III)/Mn(IV) couple to efficiently catalyze the dismutation of O2.- with the catalytic rate constant of kcat = 5.0 x 10(7) M-1 s-1 (concentration calculated per manganese) obtained by cytochrome c assay at pH 7.8 and 25 degrees C. The fifth coordination site of the manganese is occupied by