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Unusual carbohydrates from the lichen, Parmotrema cetratum
M de L da Silva1, P A Gorin, M Iacomini
1Departamento de Bioquímica, Universidade Federal do Paraná, Curitiba-PR, Brazil.
Phytochemistry
|October 1, 1993
Abstract:
The lichen Parmotrema cetratum contains traces of the unusual threitol and unexpected volemitol, along with galactose (2%). Present is a complex containing a lightly branched beta-glucan containing (1-->3) and (1-->4)-linkages in a 25:47 molar ratio chemically linked to a galactomannan with structural features common in other lichens. A glucogalactomannan with a small proportion of Glc rho side chains was also characterized.