EOG85B3ZM GO:0008121 12/49 ubiquinol-cytochrome-c reductase activity molecular_function "Catalysis of 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+." [EC:1.10.2.2, ISBN:0198547684] EOG85B3ZM GO:0009055 12/49 electron carrier activity molecular_function "Any molecular entity that serves as an electron acceptor and electron donor in an electron transport chain. An electron transport chain is a process in which a series of electron carriers operate together to transfer electrons from donors to any of several different terminal electron acceptors to generate a transmembrane electrochemical gradient." [ISBN:0198506732]