Ubiquinone, Coenzyme


The decline in immune function may pardy depend on a deficiency of coenzyme Q, a group of closely related quinone compounds (ubiquinones) that participate in the mitochondrial electron transport chain (49). Concentrations of coenzyme Q (specifically coenzyme Q q) appear to decline with age in several organs, most notably the thymus.  [c.431]

The ready reversibility of this reaction is essential to the role that quinones play in cellular respiration, the process by which an organism uses molecular- oxygen to convert its food to carbon dioxide, water, and energy. Electrons are not transfened directly from the substrate molecule to oxygen but instead are transfened by way of an electron transport chain involving a succession of oxidation-reduction reactions. A key component of this electron transport chain is the substance known as ubiquinone, or coenzyme Q  [c.1013]

Coenzyme Q (Section 24.14) Naturally occurring group of related quinones involved in the chemistry of cellular respiration. Also known as ubiquinone.  [c.1279]

Coenzyme Q, oxidized form (Q, ubiquinone)  [c.682]

The ready reversibility of this reaction is essential to the role that qumones play in cellular respiration the process by which an organism uses molecular oxygen to convert Its food to carbon dioxide water and energy Electrons are not transferred directly from the substrate molecule to oxygen but instead are transferred by way of an electron trans port chain involving a succession of oxidation-reduction reactions A key component of this electron transport chain is the substance known as ubiquinone or coenzyme Q  [c.1013]

Lipids alongside with proteins are the major components of biomembranes which directly and constantly contact with the molecular oxygen dissolved both in intercellular and intracellular liquid. This creates objective preconditions for the process of oxidation in them that goes through the stage of formation of free lipid radicals. Easily carried out and autocatalytically amplified in these conditions lipid peroxidation can result in infringement of biological membranes shareture and their functions. But it does not occur due to existence and functioning of the whole hierar chy of protective adaptations - natural antioxidants (AO) - tocopherols, ubiquinones (a synonym coenzyme QIO) and vitamins of group K which are inhibitors of free radical activity.  [c.359]


See pages that mention the term Ubiquinone, Coenzyme : [c.1013]    [c.1013]    [c.1279]    [c.522]    [c.522]    [c.522]    [c.253]    [c.680]   
Purification of laboratory chemicals (2003) -- [ c.522 ]