coenzyme

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co·en·zyme

(kō-ĕn′zīm′)

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.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

coenzyme

(kəʊˈɛnzaɪm)

(Biochemistry) biochem a nonprotein organic molecule that forms a complex with certain enzymes and is essential for their activity. See also apoenzyme

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

co•en•zyme

(koʊˈɛn zaɪm)

n.

a molecule that provides the transfer site for biochemical reactions catalyzed by an enzyme.

[1905–10; < German Ko-enzym; see co-, enzyme]

co•en`zy•mat′ic (-zaɪˈmæt ɪk, -zɪ-) adj.

co•en`zy•mat′i•cal•ly, adv.

coenzyme

A nonprotein compound that activates an enzyme to speed up a biochemical reaction.

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Noun

coenzyme - a small molecule (not a protein but sometimes a vitamin) essential for the activity of some enzymes

molecule - (physics and chemistry) the simplest structural unit of an element or compound

cocarboxylase, thiamine pyrophosphate - a coenzyme important in respiration in the Krebs cycle

coenzyme A - a coenzyme present in all living cells; essential to metabolism of carbohydrates and fats and some amino acids

NAD, nicotinamide adenine dinucleotide - a coenzyme present in most living cells and derived from the B vitamin nicotinic acid; serves as a reductant in various metabolic processes

NADP, nicotinamide adenine dinucleotide phosphate - a coenzyme similar to NAD and present in most living cells but serves as a reductant in different metabolic processes

triphosphopyridine nucleotide - a coenzyme of several enzymes

coenzyme Q, 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

Translations

coenzyme

co·en·zyme

n. coenzima, sustancia que activa la acción de una enzima.

coenzyme

n coenzima m&f; — Q coenzima Q; [Note: the RAE lists coenzima as feminine, but as with enzima, masculine usage is common, particularly in Spain.]

References in periodicals archive ?

Folic acid is converted (in the presence of ascorbic acid) in the liver and plasma to its metabolically active form (tetrahydrofolic acid) by dihydrofolatereductase [34].

Cadmium acts as a silent killer of liver by inducing oxidative stress and hepatocellular injury and a possible amelioration by vitamin B12 and folic acid in rat model

In order for dietary folic acid to exert its biological actions, it must be reduced metabolically to tetrahydrofolic acid (THF).

The role of nutritional and environmental health in preventing birth defects

Normally, the in vivo form of vitamin B12 is involved in the process of transition from methyltetrahydrofolate to tetrahydrofolic acid and is an important cofactor for the conversion of homocysteine to methionine.[5] These two processes are closely related to the formation of DNA, and to the repair and formation of myelin sheath in vivo.

Neuropsychiatric Symptoms Induced by Large Doses of Nitrous Oxide Inhalation: A Case Report

PABA is involved in the biosynthesis of tetrahydrofolic acid, which is important for the bacteria's metabolism.