Studies on the Enzyme Treatment of Coffee Beans Part V

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Other Title
  • コーヒー豆の酵素処理に関する研究(第5報)
  • 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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Abstract

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.

Journal

  • Nippon Nōgeikagaku Kaishi

    Nippon Nōgeikagaku Kaishi 45 (3), 147-150, 1971

    Japan Society for Bioscience, Biotechnology, and Agrochemistry

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