Abstract
Partial hydrolysis of the water-soluble “fucan” from Lessonia nigrescens gave monosaccharides, neutral and acidic oligosaccharides, a soluble polymer, and an insoluble residue. The neutral oligosaccharides, consisting solely of galactose, were separated into six fractions. The eight acidic oligosaccharides were inseparable mixtures, of which two were shown to contain glucuronic acid and fucose and the remainder to contain all the monosaccharides present in the original polysaccharide. The soluble polymer, which comprised 20% of the starting material and had a molecular weight of ∼8000, had an acid stability and n.m.r. spectrum indicative of a linear polymer of ∼44 alternating units of glucuronic acid and mannose.
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