Abstract
A mucous polysaccharide, named Lilium-Lo-glucomannan, has been isolated from the bulbs of Lilium longiflorum THUNB. It was homogeneous on glass-fiber paper electrophoresis and in ultracentrifugal analysis. The component sugars of it were D-mannose and D-glucose in the molar ratio of 5 : 2, and its molecular weight was estimated at 263000. 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 ten aldohexose units per non-reducing terminal group on the average. D-Mannose units occupy non-reducing terminal positions and branch points linked through positions 2 or 3. The O-acetyl groups in the polysaccharide were identified and determined as the content of 3.2%. They were located in positions 6, 2, 6, 3, 6, and 2, 3, 6 of a part of D-mannose units, and 6 and 2, 3, 6 of a part of D-glucose units.
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