Cytochrome c oxidase is an enzyme complex that uses metal ions to help coordinate the transfer of four electrons to O₂.Which metal atoms are found in the active site of this complex?

Question

Quizplus · Accepted Answer

Cytochrome c oxidase contains both iron and copper atoms in its active site. In fact, the transfer of electrons between the iron and copper atoms is a crucial step in the enzyme's catalytic cycle. Specifically, the enzyme contains one heme (iron-containing) group and one copper ion per active site. Therefore, choice B (one iron atom and one copper atom) is the best choice.

Cytochrome C Oxidase Is an Enzyme Complex That Uses Metal