title: An arabinogalactan isolated from the medicinal plant Maytenus ilicifolia.
abstract: An arabinogalactan was obtained from the leaves of Maytenus ilicifolia by hot aqueous 2% KOH extraction, followed by a freezing-thawing process and anion-exchange chromatography. It consisted of arabinose, galactose, galacturonic acid, and rhamnose in a 69:20:6:5 molar ratio. Methylation analysis, partial acid hydrolysis, and (13)C NMR spectroscopy indicated that it was an arabinogalactan containing a (1-->4)-linked beta-Galp main chain, substituted at O-6 with Ara units, which were in turn substituted at O-5 (Araf) and/or O-4 (Arap), O-3, O-3,5, and O-2,5. This arabinogalactan is probably linked to O-4 of some Rhap units of a type I rhamnogalacturonan, formed by repeating (1-->4)-alpha-D-GalpA-(1-->2)-alpha-L-Rhap groups.
authors.affiliation: Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Paraná, CP-19046, CEP-81531-990, Curitiba, PR, Brazil.
authors.forename: Thales R
authors.initials: TR
authors.lastname: Cipriani
authors.forename: Caroline G
authors.initials: CG
authors.lastname: Mellinger
authors.forename: Philip A J
authors.initials: PA
authors.lastname: Gorin
authors.forename: Marcello
authors.initials: M
authors.lastname: Iacomini
mesh_terms: D001938:Brazil; D002240:Carbohydrate Sequence; D005685:Galactans / Q000737:chemistry* / Q000302:isolation & purification*; D029755:Maytenus / Q000737:chemistry*; D019906:Nuclear Magnetic Resonance, Biomolecular; D018515:Plant Leaves / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*
chemical_list: D005685:Galactans; C005653:arabinogalactan