H. influenzae type B capsular polysaccharide
h. influenzae type b capsular polysaccharide
A polysaccharide derivative that is the capsular polysaccharide of <em>Harmophilus influenzae</em> type b, consisting of (5→3)-phosphodiester-linked β-<small>D</small>ribofuranosyl-(1→1)-<small>D</small>-ribitol units. The whole can be conjugated to a carrier protein [<em>e.g.</em> CRM<small><sub>197</sub></small>, outer membrane protein complex (OMPC)] at a single site on the polysaccharide reducing end or randomly along the polysaccharide chain (cross-linked).  An example structure is shown in the diagram.