Structure of the capsular polysaccharide from Actinobacillus pleuropneumoniae serotype 10.

The capsular polysaccharide of A. pleuropneumoniae serotype 10 was found to be composed of a linear disaccharide repeating unit. By use of methylation analysis, partial hydrolysis, g.l.c.--and f.a.b.- m.s., and 1D and 2D n.m.r. studies, the polysaccharide was determined to be a polymer of a repeating disaccharide unit composed of D-mannose and 3-deoxy-D-manno-octulosonic acid (Kdo) having the structure: [formula; see text]