Reduced cytochrome c oxidase. A new form absorbing at 443 and 603 nm.

摘要: Reduced cytochrome c oxidase is known to absorb strongly at 445 nm and 605 regardless of the chemical or physiological nature reductant. When reduced allowed interact with c3 under conditions in which there no net change oxidation state oxidase, absorption bands shift from those commonly found 443 603 nm. This new form postulated be intermediate catalytic cycle that results formation 418-nm oxidized oxidase; it further 445-nm 428-nm oxidase. The relevance 443-nm, 603-nm conformational as well its possible involvement energy transduction Site II oxidative phosphorylation are discussed.