coenzyme


Also found in: Dictionary, Thesaurus, Financial, Encyclopedia, Wikipedia.

coenzyme

 [ko-en´zīm]
an organic molecule, usually containing phosphorus and some vitamins, sometimes separable from the enzyme protein; a coenzyme and an apoenzyme must unite in order to function (as a holoenzyme).
coenzyme A a coenzyme essential for carbohydrate and fat metabolism; among its constituents are pantothenic acid and a terminal SH group, which forms linkages with various acids, e.g., acetic acid (acetyl CoA) and fatty acids (acyl CoA); abbreviated CoA.
coenzyme Q any of a group of related quinones occurring in the lipid fraction of mitochondria and serving, along with the cytochromes, as an intermediate in electron transport; they are similar in structure and function to vitamin K1.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

co·en·zyme (Co),

(kō-en'zīm),
A substance (excluding solo metal ions) that enhances or is necessary for the action of enzymes; coenzymes are of smaller molecular size than the enzymes themselves, are dialyzable and relatively heat-stable, and are usually easily dissociable from the protein portion of the enzyme; several vitamins are coenzyme precursors.
Synonym(s): cofactor (1)
Farlex Partner Medical Dictionary © Farlex 2012

coenzyme

(kō-ĕn′zīm′)
n.
An organic substance that reversibly combines with a specific protein, the apoenzyme, and with a substrate to form an active enzyme system.

co′en·zy·mat′ic (-zə-măt′ĭk) adj.
co·en′zy·mat′i·cal·ly adv.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

co·en·zyme

(kō-en'zīm)
A substance (excluding solo metal ions) that enhances or is necessary for the action of enzymes; coenzymes are of smaller molecular size than the enzymes themselves; several vitamins are coenzyme precursors.
Synonym(s): cofactor (1) .
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

coenzyme

an organic COFACTOR molecule smaller than protein that bonds with a specific ENZYME while the reaction is being catalysed. Like enzymes, coenzymes are not altered or used up in the reaction and can be used many times, but a minimal quantity is required for normal level of enzyme function and thus normal health. This explains why VITAMINS, which often act as coenzymes, are so essential. See also ACETYLCOENZYME A.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

Coenzyme

A substance needed by enzymes to produce many of the reactions in energy and protein metabolism in the body.
Mentioned in: Beriberi
Gale Encyclopedia of Medicine. Copyright 2008 The Gale Group, Inc. All rights reserved.

co·en·zyme

(kō-en'zīm)
A substance (excluding solo metal ions) that enhances or is necessary for the action of enzymes; coenzymes are of smaller molecular size than the enzymes themselves; several vitamins are coenzyme precursors.
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
Coenzyme q10 and statin-induced mitochondrial dysfunction.
According to the Cochrane Handbook 5.1.0, we split the shared trial and control groups into two groups with a smaller sample size [23] and include the four reasonably independent comparisons [Playford 2002a (coenzyme Q10 vs.
As coenzyme M is essential for methanogenesis, its biosynthesis potentially represents a specific methanogen target for inhibitor development to control methane emissions from ruminants.
To catalyze protein modification, many histone-modifying enzymes utilize coenzymes that are derived from cellular metabolic reactions, providing a link between the cellular metabolic state and gene regulation [15].
Bhagavan HN, Chopra RK, Craft NE, Chitchumroonchokchai C, Failla ML, 2007, Assesment of coenzyme Q10 absorbtion using in vitro digestion-Caco-2 cell model.
Coenzyme [Q.sub.10] may be useful in heart failure and perhaps helps lower blood pressure.
Here's an easy way you can get info on the possible benefits and risks of herbs and supplements like garlic and coenzyme Q10.
Other supplements favored for prevention and treatment include beta carotene, calcium, and selenium, and coenzyme Q10 (CoQ10), arginine, pycnogenol, and even melatonin (p.
Coenzyme Q10 is a naturally occurring hydrophobic substance that is involved in electron transfer across the mitochondrial membrane from the NADH dehydrogenase complex and the succinate-Q reductase complex to cytochrome c (Cephalalgia 2002;22:137-41).
Objective: To assess the effects of Coenzyme Q10 supplementation on glycaemic control, oxidative stress and adiponectin levels in people with type 2 diabetes.
This product is available in 30 vegetarian capsules, each providing 100 milligrams of Coenzyme Q10 merged with Nattokinase contributing 2,000 fibrinolytic activity units of enzyme potency.