EOG88D3BH GO:0004129 3/32 cytochrome-c oxidase activity molecular_function "Catalysis of the reaction: 4 ferrocytochrome c + O2 + 4 H+ = 4 ferricytochrome c + 2 H2O." [EC:1.9.3.1] EOG88D3BH GO:0005746 3/32 mitochondrial respiratory chain cellular_component "The protein complexes that form the mitochondrial electron transport system (the respiratory chain), associated with the inner mitochondrial membrane. The respiratory chain complexes transfer electrons from an electron donor to an electron acceptor and are associated with a proton pump to create a transmembrane electrochemical gradient." [GOC:curators, GOC:ecd, ISBN:0198547684]