This gene encodes a protein which is part of the ubiquinol-cytochrome c oxidoreductase complex which contains ten nuclear-encoded and one mitochondrial-encoded subunits. The encoded protein binds ubiquinone and participates in the transfer of electrons when ubiquinone is bound. Mutations in this gene are associated with mitochondrial complex III deficiency. A pseudogene has been described on the X chromosome.Synonyms: Complex III subunit 7, Complex III subunit VII, Cytochrome b-c1 complex subunit 7, QP-C, UQBP, Ubiquinol-cytochrome c reductase complex 14 kDa protein