On the mannogalactan from the fruit bodies of Pleurotus ostreatus (Fr.) Quel

摘要

The heteropolysaccharide composed of D-mannose, D-galactose and 3-O-met- hyl-D-galactose was isolated by trichloroacetic acid extraction of the fruit bodies of Pleurotus ostreatus fungi. On the basis of chemical and physical methods common in Structural analysis of polysaccharides, the main structural feature of this heteropolysac- Charide was found to be a backbone chain made up of (1→6)-linked α-D-galactopyra- Noses and 3-O-Me-α-D-galactopyranoses, a part of both these units being substituted in the position O-2 with β-D-mannopyranose residues.