Cytochrome c oxidase (COX) is the terminal enzyme of the mitochondrial respiratory chain. It is a multi-subunit enzyme complex that couples the transfer of electrons from cytochrome c to molecular oxygen and contributes to a proton electrochemical gradient across the inner mitochondrial membrane. The complex consists of 13 mitochondrial- and nuclear-encoded subunits. The functions of the nuclear-encoded subunits are unknown but they may play a role in the regulation and assembly of the complex. COX4 (COX4I1) is one of the nuclear-coded polypeptide chains of cytochrome c oxidase, the terminal oxidase in mitochondrial electron transport.
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Protein Aliases: cox iv; COX IV-1; Cytochrome c oxidase polypeptide IV; Cytochrome c oxidase subunit 4 isoform 1, mitochondrial; cytochrome c oxidase subunit IV; Cytochrome c oxidase subunit IV isoform 1; cytochrome c oxidase, subunit IVa; FLJ23483; MGC72016
Gene Aliases: AL024441; COX; COX IV-1; COX4; COX4-1; Cox4a; COX4I1; COXIV; COXIV-1; IV-1
Molecular Function: oxidase