Please use this identifier to cite or link to this item:
|Title:||NMR structural elucidation of the arabinan from Prunus dulcis immunobiological active pectic polysaccharides|
Cardoso, Susana M.
Silva, Artur M. S.
Gama, F. M.
Coimbra, Manuel A.
|Citation:||"Carbohydrate polymers". ISSN 0144-8617. 66:1 (Oct. 2006) 27-33.|
|Abstract(s):||The structure of the arabinan moiety of a purified arabinan-rich pectic polysaccharide from the cell walls of Prunus dulcis seeds was investigated by NMR spectroscopy. This polymer, which is able to induce a lymphocyte stimulatory effect, had an arabinan glycosidiclinkage composed of T-Araf: (1→5)-Araf: (1→3,5)-Araf: (1→2,3,5)-Araf in the relative proportions of approximately 3:2:1:1. Based on the ¹H, ¹³C, COSYPR, gHSQC and gHMBC spectra of analysed arabinan, a tentative structure is presented, showing that it is composed by a very branched and, possibly, repetitive structure of seven residues. The observed (1→5) direct linkage between (1→2,3,5)- Araf and (1→3,5)-Araf residues support the occurrence of these contiguous branched residues in the arabinan backbone.|
|Appears in Collections:||CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series|
Files in This Item:
|CarbhydratePolym2006-Dourado.pdf||299,46 kB||Adobe PDF||View/Open|