An acetylated galactoglucomannan from Picea abies L. Karst.
A water-soluble galactoglucomannan composed of D-galactose, D-glucose, and D-mannose in 1:3:17 mole proportion has been isolated from the secondary cell walls of Picea abies L. Karst. About 33% of the polysaccharide units were substituted by acetyl groups. Structural studies of the polymer indicated a beta-(1-->4)-linked glucomannopyranosyl backbone with a low content of branch points at O-6 of mannosyl and glucosyl residues. A preference for mannosyl groups indicates the presence of a single D-galactosyl unit side-chain. About half of the mannose residues were O-acetylated at C-2 and C-3 in 1.7:1 mole proportion.
Capek
Peter
P
Institute of Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, SK-842 38 Bratislava, Slovak Republic. chemcape@savba.sk
Alföldi
Juraj
J
Lisková
Desana
D
D000107:Acetylation; D002247:Carbon Isotopes; D009682:Magnetic Resonance Spectroscopy; D008351:Mannans / Q000737:chemistry / Q000302:isolation & purification*; D008745:Methylation; D028222:Picea / Q000737:chemistry*
D002247:Carbon Isotopes; D008351:Mannans; C443804:galactoglucomannan