Molecular function

GO:0045153, GO:0045154

Enables the transfer of a solute or solutes from one side of a membrane to the other according to the reaction: CoQH2 + 2 ferricytochrome c = CoQ + 2 ferrocytochrome c + 2 H+.

electron transporter, transferring electrons within CoQH2-cytochrome c reductase complex activity, electron transporter, transferring electrons within cytochrome c oxidase complex activity, mitochondrial electron transport complex III, ubiquinol-cytochrome c oxidoreductase activity, ubiquinol-cytochrome c-2 oxidoreductase activity, ubiquinol-cytochrome c1 oxidoreductase activity, ubiquinol-cytochrome c2 reductase activity, ubiquinol:ferricytochrome-c oxidoreductase activity, ubiquinone--cytochrome-c oxidoreductase activity, ubiquinone-cytochrome c oxidoreductase activity, ubiquinone-cytochrome c reductase activity