Abstract
Abstract Spectroscopic and electrochemical characterizations of cytochrome c551 from a denitrifying bacterium, Alcaligenes xylosoxidans GIFU 1051, have been performed. The spectral data indicate that the oxidized and reduced proteins have a six-coordinate low-spin heme. The fast electron-transfer process from cytochrome c551 to cognate Cu-containing nitrite reductase was electrochemically observed.
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