The Glucuronomannan Group of Polysaccharides

The aldobiouronic acid 2-0-(/3-D-glucopyranosyluronic acid)-D-mannose (38), which was first isolated as a product of partial acid 

The known structural features of gum ghatti are summarized in structure 44. Three additional aspects on which information is not 

Controlled hydrolysis of leiocarpan A with acid gives a degraded polysaccharide25 for which the partial structure 45 has been proposed 

Further studies on leiocarpan A have permitted further partial structures (53 and 54) to be proposed for the polysaccharide.27 A substantial proportion of the L-arabinofuranosyl residues can only be accommodated as single-unit side-chains linked (1 - 3) to D-manno-pyranosyl residues, as in 53. Although D-galactose is only a minor 

The majority of D-mannopyranosyl residues in leiocarpan A are double branch-points, and they probably also carry single D-xylopyra- 

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