Definition of ubiquinone in English:

ubiquinone

noun

Biochemistry
  • Any of a class of compounds which occur in all living cells and which act as electron-transfer agents in cell respiration. They are substituted quinones.

    • ‘The regulation of this biosynthetic pathway at the mitochondrial level depends on the ubiquinone, the alternative oxidase and a species-specific uncoupling protein.’
    • ‘Antioxidant compounds such as vitamins C and E, lipoic acid, ubiquinones, superoxide dismutase, catalase, and glucathione peroxidase can limit oxidative damage.’
    • ‘Interactions of organic molecules such as dihydropyridines, ubiquinone, tryptophan, and halothane with lipid bilayers have been studied through molecular dynamics simulations.’
    • ‘The succinate dehydrogenase complex (complex II) plays a role in both the tricarboxylic acid cycle and electron transfer to ubiquinone.’
    • ‘Strikingly, reaction centers appear to use that same solution not only for electrons but also for proton transfer toward their secondary ubiquinone acceptor site.’

Origin

1950s blend of ubiquitous and quinone.

Pronunciation

ubiquinone

/juːˈbɪkwɪnəʊn/