Abstract
A mucous polysaccharide, named Lilium-Ma-glucomannan, has been isolated from the bulbs of Lilium maculatum THUNB. It was homogeneous on glass-fiber paper electrophoresis and by ultracentrifugal analysis. The component sugars of the glucomannan were D-mannose and D-glucose in the molar ratio of 7 : 4, and its molecular weight was measured at 184000. 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 seven aldohexose units per one end group on the average. D-Mannose units occupy non-reducing terminal positions and branching points linked through positions 2 or 3. The O-acetyl groups in the glucomannan were identified and determined as the content of 4.7%. They were located in positions 2, 3, 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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