.BETA.-Glucans in the Water-insoluble Residue of Hericium erinaceum

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  • Ookushi Yuuichi
    Division of Environmental Science and Technology, Graduate School of Agriculture, Kyoto University
  • Sakamoto Masahiro
    Division of Environmental Science and Technology, Graduate School of Agriculture, Kyoto University
  • Azuma Jun-ichi
    Division of Environmental Science and Technology, Graduate School of Agriculture, Kyoto University

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Other Title
  • ヤマブシタケ子実体に含まれるβ-Glucanの抽出とその構造
  • β-glucans in the water-insoluble residue of Hericium erinaceum
  • B glucans in the water insoluble residue of Hericium erinaceum

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Abstract

Totally 92.7% of glucan present in the fruiting body of H. erinaceum could be solubilized. Of this value, 42.3, 17.7 and 10.7% were extractable by alkali, enzyme, second alkali treatments, respectively, from the residue given after microwave irradiation in water. The remained 22.0% were water-soluble (1→3; 1→6)-β-D-glucan extractable by microwave irradiation in water (Ookushi et al.: J. Appl. Glycosci., 53, 267-272 (2006)). Sugar linkage analysis of the glucan extracted from the water-insoluble residue indicated the presence of three distribution profiles of (1→3;1→6)-β-D-glucan in the water-insoluble residue; (1→3;1→6)-β-D-glucan rich in (1→3) linkages forming heavily hydrogen bonded networks, (1→3;1→6)-β-D-glucan rich in (1→6) linkages forming complex networks with protein and chitin, and (1→3;1→6)-β-D-glucan rich in (1→3) linkages forming complex networks with protein and chitin.

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