cvo:CVOL_1071 K00411 ubiquinol-cytochrome c reductase iron-sulfur subunit [EC:7.1.1.8] | (GenBank) petA; ubiquinol cytochrome c oxidoreductase PetABC, 2Fe-2S subunit cvo:CVOL_1070 K00412 ubiquinol-cytochrome c reductase cytochrome b subunit | (GenBank) petB; ubiquinol cytochrome c oxidoreductase PetABC, cytochrome b subunit