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The ubiquinone coenzyme Q (CoQ) is synthesized in mitochondria with a large, hydrophobic isoprenoid side chain. It functions in mitochondrial respiration as well as protecting membranes from oxidative damage. Yeast that cannot synthesize CoQ (ΔCoQ) are viable, but cannot grow on nonfermentable carbon sources, unless supplied with ubiquinone. Previously we demonstrated that the isoprenoid side chain...
In c‐type cytochromes, heme becomes covalently attached to the polypeptide chain by a reaction between the vinyl groups of the heme and cysteine thiols from the protein. There are two such cytochromes in mitochondria: cytochrome c and cytochrome c1. The heme attachment is a post‐translational modification that is catalysed by different biogenesis proteins in different organisms. Three types of biogenesis...
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