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Enzymes in the Biosynthesis of Hydrolyzable Tannins
1992The two classes of hydrolyzable tannins (i.e., gallotannins and ellagitan-nins) have long been postulated to originate from 1,2,3,4,6-pentagalloyl-glucose as their common precursor. The biosynthesis of this pivotal ester was studied with enzymes from oak and sumac leaves. β-Glucogallin (l-O-galloyl-β-D-glucose), the first intermediate of this metabolic
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Hydrolyzed Tannin from Euphorbia glareosa Leaves
Chemistry of Natural Compounds, 2005Hydrolyzed tannin (I), the structure of which was established using chemical investigations and UV, IR, PMR and 13C NMR spectra, was isolated from Euphorbia glareosa leaves.
L. G. Gvazava, M. D. Alaniya
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Preparation of antibodies against hydrolyzable plant tannins
Phytochemical Analysis, 1998Polyclonal antibodies were raised against covalently protein-coupled 1,2,3,4,6-pentagalloylglucose, the common and immediate precursor of the two subclasses of hydrolyzable tannins, i.e. the polyphenolic gallotannins and ellagitannins. The crude antisera were efficiently purified by affinity-chromatography on pentagalloylglucose-substituted Sepharose ...
Daniela Kaspar +2 more
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Gallic Acid Derivatives and Hydrolyzable Tannins
1989Gallic acid and its derivatives as they occur in extracts of oak-galls constitute a chemical reagent of considerable antiquity. The blue-black color produced when an aqueous infusion is treated with salts of iron was first described by Pliny; its use in the analysis of mineral waters and as a component of invisible ink were noted as early as the ...
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Accumulation of Hydrolyzable Tannins byAleurites fordiiCallus Culture
Planta Medica, 2002A callus culture of Aleurites fordii Hemsley (Euphorbiaceae) producing five galloylglucoses and an ellagitannin, geraniin, was established. The production of pentagalloylglucose was remarkably enhanced under light irradiation compared with that in the dark.
Shoko, Taniguchi +6 more
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Hydrolyzable tannin substances
Chemistry of Natural Compounds, 1975T. K. Chumbalov, T. N. Bikbulatova
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Biosynthesis, Biodegradation, and Cellular Localization of Hydrolyzable Tannins
1999Tannins occupy a prominent position among plant polyphenols, not only because of their widespread occurrence in the plant kingdom but also on grounds of their technological, ecological, and medical significance. Unfortunately, it is impossible to describe simply this large group of natural products on the basis of a common, general chemical structure ...
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