納豆の粘質物に関する研究-2-

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  • 納豆の粘質物に関する研究(第 2 報)(B. 生活科学)
  • ナットウ ノ ネンシツブツ ニカンスルケンキュウ 2
  • Studies on Natto Mucilage (Part II) (B. LIVING SCIENCE)

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Abstract

In previous paper, the authors reported that Natto mucilage, an extracellular mucilage from bacterium Bacillus subtilis var. natto IFO 3335,is the glycopeptide containing polyuronide in its carbohydrate moiety. On the basis of this finding, the authors investigated the relation between chemical composition of mucilage and its physicochemical properties. Since Pronase digestion of the Natto mucilage has no effect on the viscosity, it is evident that only carbohydrate moiety contributed to the viscosity. Identification of uronic acid in Natto mucilage were carried out by column chromatography with Dowex-1 and by thin layer chromatography on Replate-50. The only uronic acid found in Natto mucilage was D-galacturonic acid. It was also found that Natto mucilage binds metalic ions such as Ca^<2+>, Cd^<2+>, Hg^<2+> and Fe^<3+>.

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