Glucomannan from plant cell-walls

A number of plant [106, 178-183] and algal [64, 176] polysaccharides have structures based on a P(l-4)mannan main chain - P(l-4)mannan, a(l-6)galacto-P(l-4)-D-mannan and the related P(l-4)-D-glucomannan and galacto-P(l-4)glucomannan. They serve as cell wall structural material and as carbohydrate reserve polymers. An unbranched P(l-2) mannan of low molecular weight has been reported from the insect flagellate Herpetomonas samuelpessoai [184]. 

Isol. from the enzymatic hydrolysates of tamarind polysaccharide, Jack pine Pinus banksiana) glucomannan, leaves of Nicotiana tabacum, and other polysaccharide sources. Constituent in cell wall polysaccharide of immature barley plants. [a]o +74 (c, 0.5 in H2O) (+71). 

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