On the free sugars and cyanogenic glycoside in the seed of Vicia angustifolia var. segetalis. I. Free sugars and their changes by incubation of homogenate of the seeds

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  • カラスノエンドウ種子の遊離糖類と青酸配糖体ビシアニンについて Ⅰ. 遊離糖類とその粉砕種子の加温による変化
  • カラスノエンドウ種子の遊離糖類と青酸配糖体ビシアニンについて-1-遊離糖類とその粉砕種子の加温による変化
  • カラスノエンドウ シュシ ノ ユウリ トウルイ ト セイサン ハイトウタイ ビ

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The seed of Vicia angustifolia L. var. segetalis Koch contained only 0.066% reducing sugar and 6.26% total sugar on dry basis, when determined after extraction with 80% ethanol and water. These sugar contents were similar to other legume seeds. However, saccharose and α-galactosylsaccharoses were absent. The main free sugars were tetra- and pentasaccharides, and the latter was presumed to consist of galactose and glucose residues in molar ratio of 4 : 1. Incubation of the seed homogenate caused decrease in higher oligosaccharides and remarkable increase in galactose and lesser increase in other monosaccharides (glucose, arabinose, and xylose). When the incubation time was short there appeared a disaccharide, probably vicianose or 6-(β-L-arabinosyl)-D-glucose. The crude enzyme solution catalyzed the degradation of maltose, melibiose, lactose, raffinose, and stachyose, but did not catalyze that of saccharose. The identification of sugars was made by paper, thin layer, and gas chromatographies.

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