Sulphated xylogalactans from Nothogenia fastigiata
Fractionation of the Cetrimide salt of the sulphated polysaccharides of Nothogenia fastigiata led to the isolation of a complex product constituted by a xylogalactan sulphate and a xylomannan sulphate. Its structural study by methylation and desulphation-methylation analyses and 13C NMR spectroscopy...
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| Autores principales: | , , |
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| Formato: | JOUR |
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_00319422_v36_n1_p97_Matulewicz |
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| Sumario: | Fractionation of the Cetrimide salt of the sulphated polysaccharides of Nothogenia fastigiata led to the isolation of a complex product constituted by a xylogalactan sulphate and a xylomannan sulphate. Its structural study by methylation and desulphation-methylation analyses and 13C NMR spectroscopy indicated for the xylogalactan sulphate a backbone formed by 4-linked α-l-galactopyranose and 3-linked β-d-galactopyranose. The α-l-galactopyranosyl units are either 6-sulphated having single stubs of (1 → 3)-linked xylose or galactose, 3-sulphated or non-substituted. The β-d-galactopyranosyl residues are non-substituted or 4-sulphated. The xylomannan sulphate is similar to that previously isolated from this seaweed. © 1994. |
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