Plant Mucilages. XIII. Isolation and Characterization of a Mucous Polysaccharide, "Lilium-S-glucomannan, "from the Bulbs of Lilium speciosum
1976 年 24 巻 9 号 p. 2157-2162
詳細
1976 年 24 巻 9 号 p. 2157-2162
A mucous polysaccharide, named Lilium-S-glucomannan, has been isolated from the bulbs of Lilium speciosum THUNB. It was homogeneous on glass-fiber paper electrophoresis and by ultracentrifugal analysis. The component sugars of it were D-mannose and D-glucose in the molar ratio of 2 : 1, and its molecular weight was estimated at 388000. Methylation, periodate oxidation and partial acetolysis studies suggested that the polysaccharide is mainly composed of β-1→4 linked aldohexopyranose residues and it contains about six aldohexose units per one end group on the average. Mannose units occupy nonreducing terminal positions and branch points at position 3. The O-acetyl groups in the polysaccharide were identified and determined as the content of 3.3%. They were located in both positions 3 and 6 of a part of D-mannose units.
