Life · life

Cytochrome c oxidase

Enzyme · Cu, Fe, O

Numbers
Four electrons and four protons per oxygen molecule. This is where almost all the oxygen you breathe ends up.
Kind
Enzyme

Function

The last step of respiration: takes electrons that have come down the whole chain and hands them to oxygen, making water. Two copper centres and two haem irons pass the charge along, and the energy released pumps protons for ATP synthase to spend.

Elements

CuFeO

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From the Life database in Notion, last edited 2026-08-25. This page is the row, rendered by the build; nothing on it is written by hand.