Abstract
From the partial hydrolysates of the lipopolysaccharides from strains 2 (Sh. flexneri 1b) and 1290/63 (Sh. flexneri var. Y) we isolated in both cases a Rha-Rha-disaccharide. After trimethylsilylation, gas liquid chromatographic purification and mass spectrometry we could show that the rhamnose molecules of both disaccharides were linked to each other by a 1,3-glycosidic bond. As we could estimate the other linkages in the O-specific side chains of these lipopolysaccharides in recent studies, we are now able to present the following structures for the repeating units: In addition, we found in the lipopolysaccharide of strain 1290/63 rather big quantities of a poly-α-(1,4)-glucan.
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