Structure of tanacetan,a pectic polysaccharide from tansy Tanacetum vulgare L |
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Authors: | Polle A Ya Ovodova R G Chizhov A O Shashkov A S Ovodov Yu S |
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Institution: | (1) Institute of Physiology, Komi Science Center, Ural Branch of the Russian Academy of Sciences, ul. Pervomaiskaya 50, Syktyvkar, 167982, Russia;(2) Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky pr. 47, Moscow, 119991, Russia |
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Abstract: | Tanacetan TVF was found to have a branched structure with a backbone of linear -1,4-D-galacturonan. The ramified regions consist of linear -1,2-L-rhamno--1,4-D-galacturonan as the core. The side chains appear to attach to the 4-position of the L-rhamnopyranose residues. They are present as single -galactopyranose residues or a branching -1,4-galactopyranan bearing 4,6-substituted -D-galactopyranose residues as branched points. In addition, the ramified regions contain side chains of a branched -1,5-arabinofuranan possessing 2,5- and 3,5-substituted -L-arabinofuranose residues as branching points. Some side chains of rhamnogalacturonan appear to be arabinogalactan which contains branched sugar chains of -1,5-arabinofuranan attached to the linear chains of -1,4-galactopyranan by 1,3- and 1,6-linkages. The residues of -L-arabinofuranose seem to occupy the terminal positions of the arabinogalactan side chains. |
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Keywords: | Tanacetum vulgare L pectins tanacetan structure of plant polysaccharides NMR spectroscopy of polysaccharides GLC-MS of methylated sugars |
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