Biosynthesis of gallotannins. Enzymatic conversion of 1,6-digalloylglucose to 1,2,6-trigalloylglucose |
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Authors: | Klaus Denzel Gerhard Schilling Georg G Gross |
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Institution: | (1) Abteilung Allgemeine Botanik, Universität Ulm, Oberer Eselsberg, D-7900 Ulm, Federal Republic of Germany;(2) Organisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, D-6900 Heidelberg, Federal Republic of Germany |
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Abstract: | Cell-free extracts from Rhus typhina L. (staghorn sumach) leaves were found to catalyze the transfer of the galloyl moiety of -glucogallin (1-O-galloyl- -D-glucose) to 1,6-di-O-galloyl- -D-glucose, resulting in the specific formation of 1,2,6-tri-O-galloyl- -D-glucose, an intermediate of gallotannin biosynthesis. The reaction product was unequivocally identified by co-chromatography with authentic references using reversed-phase high-performance liquid chromatography and by 1H-nuclear-magnetic-resonance spectroscopy.Abbreviations HPLC
high-performance liquid chromatography
- NMR
nuclear magnetic resonance |
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Keywords: | 1 6-Di-O-galloyl- -D-glucose" target="_blank">gif" alt="beta" align="MIDDLE" BORDER="0">-D-glucose Gallotannin biosynthesis -Glucogallin" target="_blank">gif" alt="beta" align="MIDDLE" BORDER="0">-Glucogallin Leaf (gallotannin synthesis) 1 2 6-Tri-O-galloyl- -D-glucose" target="_blank">gif" alt="beta" align="MIDDLE" BORDER="0">-D-glucose Rhus |
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