coenzyme A
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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 A (CoA),
(kō-en'zīm),A coenzyme containing pantothenic acid, adenosine 3'-phosphate 5'-pyrophosphate, and cysteamine; involved in the transfer of acyl groups, notably in transacetylations.
Farlex Partner Medical Dictionary © Farlex 2012
coenzyme A
n. Abbr. CoA
A coenzyme present in all living cells that transfers acetyl or acyl groups in metabolic reactions and that regulates gene expression through acetylation of histones.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
co·en·zyme A
(CoA) (kō-en'zīm)A coenzyme containing pantothenic acid, adenosine 3'-phosphate 5'-pyrophosphate, and cysteamine; involved in the transfer of acyl groups, notably in transacetylations.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
coenzyme A
see ACETYLCOENZYME A.Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005