Structure of polysaccharides from the fruiting body of Hericium erinaceus Pers

The water-soluble crude polysaccharide HP, obtained from the fruiting body of Hericium erinaceus Pers by boiling-water extraction and ethanol precipitation, was fractionated by DEAE-Sepharose CL-6B column chromatography, giving two polysaccharide fractions termed HPA and HPB. The polysaccharide of HPA consists of Glc, Gal and Fuc in the ratios 1:2.110:0.423, and HPB contains the monosaccharides Gal and Glc in molar ratios of 1:11.529. On the basis of methylation and GC-MS analysis, periodate oxidation-Smith degradation, and partial acid hydrolysis, the repeating units of HPA and HPB were established: