Electron Transport Complex III

**Definition:** A multisubunit enzyme complex that contains CYTOCHROME B GROUP; CYTOCHROME C1; and iron-sulfur centers. It catalyzes the oxidation of ubiquinol to UBIQUINONE, and transfers the electrons to CYTOCHROME C. In MITOCHONDRIA the redox reaction is coupled to the transport of PROTONS across the inner mitochondrial membrane.

**Tree numbers:** - D05.500.562.750.500 - D08.811.600.250.875.500 - D08.811.682.830.500 - D12.776.157.427.374.375.954 - D12.776.157.530.450.250.875.303 - D12.776.543.277.875.500 - D12.776.543.585.450.250.875.468 - D12.776.556.579.374.375.142

**Synonyms:** - Coenzyme Q-Cytochrome-c Reductase - Coenzyme QH2-Cytochrome-c Reductase - Complex III - Cytochrome b-c2 Oxidoreductase - Dihydroubiquinone-Cytochrome-c Reductase - QH(2)-Cytochrome-c Reductase - QH(2)-Ferricytochrome-c Oxidoreductase - Ubihydroquinone-Cytochrome-c Reductase - Ubiquinol-Cytochrome c Reductase - Ubiquinol-Cytochrome-c Reductase - Ubiquinone-Cytochrome b-c2 Oxidoreductase