Structural Features of Ukonan C, a Reticuloendothelial System-Activating Polysaccharide from the Rhizome of Curcuma longa
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The structural features of ukonan C, the polysaccharide having remarkable reticuloendothelial system-potentiating activity obtained from the rhizome of Curcuma longa L., were investigated by methylation analysis, carbon-13 nuclear magnetic resonane, periodate oxidation and enzymic degradation studies. It is mainly made up of arabino-3,6-galactan type and 4,6-branched glucan type structural units. Degradation with α-amylase followed by the elimination of 1,4-linked glucan side chains resulted in a marked decrease of its immunological activity.
- 1991-02-25
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