コーヒー豆の酵素処理に関する研究(第5報)

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タイトル別名
  • Studies on the Enzyme Treatment of Coffee Beans Part V
  • コーヒーマメ ノ コウソ ショリ ニ カンスル ケンキュウ 5 アラビノガラクタン ノ スイテイ コウゾウ
  • Structure of Coffee Arabinogalactan
  • アラビノガラクタンの推定構造

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The chemical structure of coffee arabinogalactan was studied by enzymatic and chemical methods. The arabinogalactan was hydrolyzed by a purified galactanase of Rhizopus niveus, and the products were separated by Sephadex G-15 gel filtration and paper chromatography.<br> Arabinose, galactose and a galactobiose were isolated in an approximately equal molar ratio. This galactobiose was identified as 6-O-β-galactosyl-galactose. Four other oligosaccharides were also found in the hydrolytic products in small amounts, and their structures were studied.<br> On the basis of these results, the structure of the arabinogalactan was discussed.

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