Carbohydrate composition of winged bean (Psophocarpus tetragonolobus).

The carbohydrate composition of winged bean has been studied,
The seeds contain about 42.2% total carbohydrates of which starch
alone accounts for 36.2%. The total monosaccharides constituted
2.7% and were identified as glucose (1.17%) and fructose (1.5%);
oligosaccharides amounted to only 0.61% and were identified as
sucrose, raffinose, stachyose, and verbascose, on a dry defatted
basis. The cold water soluble gum of winged bean contains glucose
and xylose as the major sugars together with a small amount of
arabinose while hot water soluble gum was found to be a glucantype
polymer. Hemicellulose A consisted of glucose, xylose, and
arabinose (15.5:9:1) whereas hemicellulose B consisted exclusivelyo
f glucosein dicatingt hat it is alsoa glucan-typep olymer.