Comparison of the Solubility and Inclusion Characteristics of Cyclodextran with Cyclodextrin
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概要
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The solubility and some inclusion characteristics of the newly developed sugar, cyclodextran (cyclic isomaltooligosaccharides: heptamer, CI-7; octamer, CI-8; nonamer, CI-9), were compared with those of cyclodextran (CD: hexamer, α-CD; heptamer, β-CD; octamer, γ-CD). In spite of the high solubility of CI in water, CI-9 was readily precipitated by mixing with 80% ethanol and n-propanol. Rather higher interactions of CIs with Trp than CDs were observed. Although CDs gave higher amounts of precipi-tate upon reaction with various surfactants, the interaction of CIs with surfactants was rather poor. The precipitate formation of CIs was greatly improved by the addition of 73% ethanol or acetonitrile, suggesting that a decrease in the solubility of CIs would lead to an increase in inclusion reactions. The action of α-glucosidase on the substrate phenyl a-glucoside was inhibited by CIs, while CDs gave opposite results accelerating the enzyme reaction.
- 日本応用糖質科学会の論文
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