The Xyloglucan Group of Polysaccharides

A gel-forming polysaccharide may be isolated from the thickened cell-walls of the cotyledons of the seeds of tamarind (Tamarindus 

Structure 87 has been proposed for the tamarind-seed polysac- 

An examination of another sample of the tamarind-kernel polysaccharide has given markedly different results, and it must be concluded that this preparation represents a distinct polysaccharide.151 The structural features outlined in the partial formula 87 are clearly present, as shown in a similar series of experiments. The composition of this polysaccharide is, however, clearly different from that reported 

Polysaccharides of the xyloglucan may be of relatively widespread occurrence, and examples have been reported from the bark of Engel-mann spruce (Picea engelmann), 5 red-spruce compression-wood,155 the seeds of white mustard (Brassica alba),156 and sycamore callus-cells.157 The mustard156 and sycamore157 polysaccharides are charac- 

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