Department of Macromolecules, Indian Association for the Cultivation of Science, Calcutta-700 032 India;P.G. Institute of Basic Medical Science, Calcutta University, Calcutta-700 020 India;Department of Pharmacy, Jadavpur University, Calcutta-700 032 India
Abstract:
The polysaccharide obtained from the O-somatic antigen of Shigella dysenteriae type 7 (strain NCTC 519/66) contains d-glucose, d-galactose, and 2-acetamido-2-deoxy-d-glucose in the mole ratios of 2:1:1. From the results of methylation, periodate oxidation, graded hydrolysis, and deamination studies, the structure assigned to the repeating unit of the polysaccharide is as follows.
