Exopolysaccharide of the bacterium Shigella sonnei, method to produce it, vaccine and pharmaceutical composition containing it

摘要

Shigella sonnei polysaccharide antigen, phase I, consisting of 1-100 repeating disaccharide units of O- [4-amino-2- (N-acetyl) amino-2,4-dideoxy-ß-D-galactopyranosyl] - ( 1 → 4) -O- [2- (N-acetyl) amino-2-deoxy-α-Laltripyranuronic acid] linked within the polysaccharide chain by bonds (1 → 3), and non-hydroxylated fatty acids.