Formation of the “Peroxy” Intermediate in Cytochrome c Oxidase Is Associated with Internal Proton/Hydrogen Transfer

When dioxygen is reduced to water by cytochrome c oxidase a sequence of oxygen intermediates are formed at the reaction site. One of these intermediates is called the “peroxy” (P) intermediate. It can be formed by reacting the two-electron reduced (mixed-valence) cytochrome c oxidase with dioxygen (...

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