text: * MT-CYB: mtDNA encoded cytochrome b; mutations associated with exercise intolerance
  * CYC1: cytochrome c1
  * CYCS: cytochrome c
  * UQCRFS1: Rieske iron sulfur protein
  * UQCRB: Ubiquinone binding protein, mutation linked with mitochondrial complex III deficiency nuclear type 3
  * UQCRH: hinge protein
  * UQCRC2: Core 2, mutations linked to mitochondrial complex III deficiency, nuclear type 5
  * UQCRC1: Core 1
  * UQCR: 6.4KD subunit
  * UQCR10: 7.2KD subunit
  * TTC19: Newly identified subunit, mutations linked to complex III deficiency nuclear type 2. Helps remove the N-terminal fragment of UQCRFS1, which would otherwise interfere with complex III function.