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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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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



(also called pyridoxol), vitamin B6. Pyridoxine is found in largest amounts in rice bran, beans, yeast, kidneys, liver, and muscles. Its structural formula is

In animal tissues, pyridoxine is converted into pyridoxal phosphate, an active coenzyme form of vitamin B6 A deficiency of pyridoxine in the diet gives rise to dermatitis and convulsions.


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The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
But in case of insufficient convulsion control with pyridoxin treatment, diazepam infusion may be started after maintaining airway.
Five experimental diets were formulated in each phase: a nonFM group (control); a control + FM 3% supplemented group (3% FM); a control + FM 3% + pyridoxine 10 ppm supplemented group (3% FM-pyridoxin); a control + FM 6% supplemented group (6% FM); and a control + FM6% + pyridoxin 10 ppm supplemented group (6% FM-pyridoxin).
Formulation of the condiet, as-fed basis Ingredient (%) Control diet Corn 57.3 Soybean meal 14.0 Cornstarch 10.0 Sugar beet pulp 5.0 Potato protein 5.0 Dried egg white 3.0 Soy oil 2.0 Limestone 1.2 Vitamin-mineral premix (1) 1.0 Dextrose 1.0 DL-methionine 0.1 L-tryptophan 0.1 Ti[O.sub.2] 0.3 (1) Vitamin-mineral premix (BASU-Mineralfutter GmbH, Bad Sulza, Germany) provided per kg of diet: vitamin A, 4,000 IU; vitamin [D.sub.3], 500 IU; vitamin E, 15 IU; menadione, 150 [micro]g; thiamine, 1.7 mg; riboflavin, 2.5 mg; pyridoxin, 3 mg; cobalamin, 18 [micro]g; pantothenic acid, 10 mg, niacin, 15 mg; folic acid, 0.25 mg; biotin, 20 [micro]g; choline chloride, 500 mg; Ca, 1.5 g; Na, 1 g; Mg, 500 mg; Zn, 100 mg; Fe, 100 mg; Mn, 20 mg; Cu, 6 mg; Co, 75 [micro]g; I; 200 [micro]g; Se, 300 [micro]g.
[K.sub.3], 2 mg; thiamin, 2 mg; riboflabin, 6 mg; pyridoxin, 2 mg; vit.