A gallotannin is a class of molecules belonging to the hydrolysable tannins. Gallotannins are polymers formed when gallic acid, a polyphenol monomer, esterifies and binds with the hydroxyl group of a polyol carbohydrate such as glucose. ==Metabolism== Gallate 1-beta-glucosyltransferase uses UDP-glucose and gallate to produce UDP and 1-galloyl-beta...
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http://en.wikipedia.org/wiki/Gallotannin
(from the article `tannin`) ...condensed. Hydrolyzable tannins (decomposable in water, with which they react to form other substances), yield various water-soluble products, ...
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http://www.britannica.com/eb/a-z/g/5
Tannins contained in plants; see under gallic acid.
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https://glossary.wein.plus/gallotannin
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