The 4-amino sugars present in the lipopolysaccharides of vibro cholerae and related vibrios.

Brief treatment, with 10 M hydrochloric acid, of the lipopolysaccharides of Vibrio cholerae and related organisms led to the release of 4-amino-4, 6-dideoxy-D-mannose (D-perosamine) and 4-amino-4-deoxyl-L-arabinose. These sugar are highly unstable and undergo complex changes in neutral and basic media. Of the strains examined, the lipopolysaccharides from representatives of the Inaba group contain only D-perosamine, while those of the Ogawa biotype have 4-amino-4-deoxyl-L-arabinose as an additional component. The other Vibrios produce lipopolysaccharides which lack these sugars.