Galactomannan (yield 1.73% of seed mass) with molecular weight 808 kDa was isolated from seeds of Gueldenstaedtia monophylla Fisch. (Fabaceae). Its solutions were typically highly viscous with [η] 664.7 mL/g and optically active with [α]D +45.2°. It consisted of galactose and mannose in a 1:1.91 ratio. Physical chemical methods established that the principal chain of the polysaccharide consisted of 1,4-β-D-mannopyranose units substituted 50.1% in the C-6-position by single α-D-galactopyranose units and traces of 6-O-α-galactopyranosylgalactopyranose. The contents of mannobiose blocks substituted by galactose Man–Man, (Gal)Man–Man/Man–Man(Gal), and (Gal)Man–Man(Gal) in the galactomannan macromolecule were 23, 42, and 35%, respectively.
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The work was supported financially by the Lavrent’ev Competition for Young Scientists, SD, RAS.
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Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 573–575, September–October, 2010.
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Olennikov, D.N., Selyutina, I.Y. & Rokhin, A.V. Polysaccharides from Fabaceae. IV. Galactomannan from Gueldenstaedtia monophylla seeds. Chem Nat Compd 46, 673–676 (2010). https://doi.org/10.1007/s10600-010-9713-3
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DOI: https://doi.org/10.1007/s10600-010-9713-3