cobalamin

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cobalamin:

see coenzymecoenzyme
, any one of a group of relatively small organic molecules required for the catalytic function of certain enzymes. A coenzyme may either be attached by covalent bonds to a particular enzyme or exist freely in solution, but in either case it participates intimately in
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; vitaminvitamin,
group of organic substances that are required in the diet of humans and animals for normal growth, maintenance of life, and normal reproduction. Vitamins act as catalysts; very often either the vitamins themselves are coenzymes, or they form integral parts of coenzymes.
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.
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cobalamin

[kə′bȯl·ə·mən]
(biochemistry)
vitamin B12
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Useful assays for B vitamin status include plasma homocysteine, serum cobalamine, serum methylmalonic acid, serum folic acid, and red blood cell folic acid.
Amino acids, oligo- and polypeptides, macro-cyclic agents (porphyrins, cobalamines, chlorophylls); polysaccharides and glycosides, nucleobases, oligo-polynucleosides, nucleotides and bioligands of vascular bundle of plant tissues are found to be responsible for the biosorption properties of the plant materials.