a quinone

1. 2 a quinone + NADPH + H(+) = 2 a 1,4-benzosemiquinone + NADP(+)

Catalysed by CRYZ, TP53I3, VAT1, VAT1L

1. 1-(beta-D-ribofuranosyl)-1,4-dihydronicotinamide + a quinone + H(+) = beta-nicotinamide D-riboside + a quinol

Catalysed by NQO2

1. L-proline + a quinone = (S)-1-pyrroline-5-carboxylate + a quinol + H(+)

Catalysed by PRODH, PRODH2

1. (R)-malate + a quinone = enol-oxaloacetate + a quinol

Catalysed by SDHB, SDHAOne of 2 routes

1. a quinone + succinate = fumarate + a quinol

Catalysed by SDHB

1. a quinol + 2 Fe(III)-[cytochrome c](out) = a quinone + 2 Fe(II)-[cytochrome c](out) + 2 H(+)(out)

Catalysed by CYC1, UQCRFS1outer side of the membraneOne of 12 routes

1. (S)-dihydroorotate + a quinone = orotate + a quinol

Catalysed by DHODH

1. a quinone + sn-glycerol 3-phosphate = dihydroxyacetone phosphate + a quinol

Catalysed by GPD2

1. a quinone + hydrogen sulfide + glutathione + H(+) = S-sulfanylglutathione + a quinol

Catalysed by SQOR

1. trans-4-hydroxy-L-proline + a quinone = (3R,5S)-1-pyrroline-3-hydroxy-5-carboxylate + a quinol + H(+)

Catalysed by PRODH2

1. a quinone + sn-glycerol 3-phosphate = dihydroxyacetone phosphate + a quinol
2. beta-D-fructose 1-phosphate = D-glyceraldehyde + dihydroxyacetone phosphate

Catalysed by GPD2, ALDOB

1. a quinone + succinate = fumarate + a quinol
2. (S)-malate hydro-lyase (fumarate-forming)

Catalysed by SDHB, FHcytosolOne of 5 routes

1. (R)-malate + a quinone = enol-oxaloacetate + a quinol
2. oxaloacetate = enol-oxaloacetate
3. acetyl-CoA:oxaloacetate C-acetyltransferase (thioester-hydrolysing)

Catalysed by SDHB, SDHA, FAHD2B, FAHD1 and 2 moremitochondrial matrixOne of 2 routes

1. a quinone + hydrogen sulfide + glutathione + H(+) = S-sulfanylglutathione + a quinol
2. S-sulfanylglutathione + O2 + H2O = sulfite + glutathione + 2 H(+)
3. cumene hydroperoxide + 2 glutathione = 2-phenylpropan-2-ol + glutathione disulfide + H2O