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 (yo͞o′bĭ-kwĭ-nōn′, -kwĭn′ōn′)
Any of a family of fat-soluble quinone compounds that are found in the membranes of eukaryotic cells, especially in mitochondria, and serve as electron carriers in cellular respiration and other processes. Also called coenzyme Q.

[Blend of ubiquitous (from its widespread distribution) and quinone.]


(Biochemistry) another name for coenzyme Q
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.ubiquinone - any of several quinones found in living cells and that function as coenzymes that transfer electrons from one molecule to another in cell respiration
biochemistry - the organic chemistry of compounds and processes occurring in organisms; the effort to understand biology within the context of chemistry
coenzyme - a small molecule (not a protein but sometimes a vitamin) essential for the activity of some enzymes
benzoquinone, quinone - any of a class of aromatic yellow compounds including several that are biologically important as coenzymes or acceptors or vitamins; used in making dyes
References in periodicals archive ?
Interactions of mitochondria-targeted and untargeted ubiquinones with the mitochondrial respiratory chain and reactive oxygen species.
Murphy, "Interactions of mitochondria-targeted and untargeted ubiquinones with the mitochondrial respiratory chain and reactive oxygen species: implications for the use of exogenous ubiquinones as therapies and experimental tools," The Journal of Biological Chemistry, vol.
Ubiquinones are lipid-soluble quinon derivatives, which in reduced form act as antioxidants; ubiquinones react with ROS to prevent lipid peroxidation, and have an important role in the recycling of vitamin E (66).
Simultaneous determination of tocopherols, ubiquinols, and ubiquinones in blood, plasma, tissue homogenates, and subcellular fractions.
Leg cramps may be the most common, and may occur because statins deplete enzymes called ubiquinones.
2000) characterized endogenous ubiquinones that stimulate or inhibit pore function by means of a putative quinone binding site in the PTP.
Ubiquinones are found naturally in every living cell in the human body.
Exotic butters are also rich in unsaponifiables such as sterols, ubiquinones, fatty alcohols, fatty esters and triterpines.
Packer, "Antioxidant effects of ubiquinones in microsomes and mitochondria are mediated by tocopherol recycling," Biochemical and Biophysical Research Communications, vol.
Statins inhibit the synthesis of ubiquinones, enzymes that play a basic role in cell functioning.