title: Heteropolysaccharides of the lichen Evernia prunastri.
abstract: Extraction of Evernia prunastri with hot aqueous alkali solubilized heteropolysaccharide-containing material which was purified via Fehling precipitation. Further workup of this polysaccharide with Cetavlon gave two fractions having related but different structures. Each structure consisted of a 1-->6-linked alpha-D-Man p main chain partially monosubstituted at O-2 with side chains of alpha-D-Gal p and partially disubstituted at O-2 and O-4 with alpha-D-Gal p and beta-D-Gal p, respectively. The fractions differed in that one contained much more uronic acid than the other, with corresponding predominance of side chains containing alpha-D-Glc pA-(1-->3)-D-Glc p, alpha-D-Gal p-(1-->2)-D-Glc p, and beta-D-Gal f units.
authors.affiliation: Departamento de Bioquímica, Universidade Federal do Paraná, Curitiba, Brazil.
authors.forename: A Z
authors.initials: AZ
authors.lastname: Teixeira
authors.forename: M
authors.initials: M
authors.lastname: Iacomini
authors.forename: B
authors.initials: B
authors.lastname: McCune
authors.forename: P A
authors.initials: PA
authors.lastname: Gorin
mesh_terms: D002240:Carbohydrate Sequence; D008401:Gas Chromatography-Mass Spectrometry; D008011:Lichens / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008969:Molecular Sequence Data; D011134:Polysaccharides / Q000737:chemistry* / Q000302:isolation & purification; D017421:Sequence Analysis; D014574:Uronic Acids / Q000032:analysis
chemical_list: D011134:Polysaccharides; D014574:Uronic Acids