Rhamnoarabinosyl and rhamnoarabinoarabinosyl side chains as structural features of coffee arabinogalactans.

@article{Nunes2008RhamnoarabinosylAR,
  title={Rhamnoarabinosyl and rhamnoarabinoarabinosyl side chains as structural features of coffee arabinogalactans.},
  author={Fernando M. Nunes and Ana E S Reis and Artur M S Silva and M Ros{\'a}rio M Domingues and Manuel A. Coimbra},
  journal={Phytochemistry},
  year={2008},
  volume={69 7},
  pages={1573-85}
}
The hot water soluble green coffee arabinogalactans, representing nearly 7% of total coffee bean arabinogalactans, were characterized by (1)H and (13)C NMR and, after partial acid hydrolysis, by ESI-MS/MS. Data obtained showed that these are highly branched type II arabinogalactans covalently linked to proteins (AGP), with a protein moiety containing 10% of 4-hydroxyproline residues. They possess a beta-(1-->3)-Galp/beta-(1-->3,6)-Galp ratio of 0.80, with a sugars composition of Rha:Ara:Gal of… CONTINUE READING

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