Electron Transport Complex IV

**Definition:** A multisubunit enzyme complex containing CYTOCHROME A GROUP; CYTOCHROME A3; two copper atoms; and 13 different protein subunits. It is the terminal oxidase complex of the RESPIRATORY CHAIN and collects electrons that are transferred from the reduced CYTOCHROME C GROUP and donates them to molecular OXYGEN, which is then reduced to water. The redox reaction is simultaneously coupled to the transport of PROTONS across the inner mitochondrial membrane.

**Tree numbers:** - D05.500.562.374 - D08.811.600.250.687 - D08.811.682.285 - D12.776.157.530.450.250.875.304 - D12.776.543.277.687 - D12.776.543.585.450.250.875.484

**Synonyms:** - Cytochrome Oxidase - Cytochrome-c Oxidase - Cytochrome-c Oxidase (Complex IV) - Ferrocytochrome c Oxygen Oxidoreductase