Extracellular Polysaccharide of Cladosporium herbarum Studies on Fungal Polysaccharide. XIII

抄録

Major water-soluble extracellular polysaccharide of C. herbarum obtained by DEAE-cellulose column fractionation and zone electrophoresis using 1% Na₂B₄O₇ of crude polysaccharide is a galactomannan, [α]²⁵_D+27°(c=1.0, H₂O), which was composed of D-galactose and D-mannose=1.0 : 1.5. From the results of periodate oxidation, Smith-type degradation, and methylation studies showed that the polysaccharide has a highly branched structure and contains 1→2 main linkage of mannopyranose with 1→4 linked galactopyranose, and the glycan was branching at C4 position of mannose residue. The terminal residues are galactofranose and mannopyranose.