ubiquinone

Noun

Meaning

any of several quinones found in living cells and that function as coenzymes that transfer electrons from one molecule to another in cell respiration

Synonyms

Hypernyms

Examples

This QH 2 is then released from the enzyme. citation As coenzyme Q is reduced to ubiquinol on the inner side of the membrane and oxidized to ubiquinone on the other, a net transfer of protons across the membrane occurs, adding to the proton gradient. Source: Internet

The different antioxidants are present at a wide range of concentrations in body fluids and tissues, with some such as glutathione or ubiquinone mostly present within cells, while others such as uric acid are more evenly distributed (see table below). Source: Internet

Reduction of ubiquinone also contributes to the generation of a proton gradient, as two protons are taken up from the matrix as it is reduced to ubiquinol (QH 2 ). Source: Internet

When Q accepts two electrons and two protons, it becomes reduced to the ubiquinol form (QH 2 ); when QH 2 releases two electrons and two protons, it becomes oxidized back to the ubiquinone (Q) form. Source: Internet

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