[3)-beta-L-Rhap-(1->4)-beta-D-Glcp-(1->3)-[alpha-D-GlcpA-(1->6)-alpha-D-Glcp-(1->2)]-alpha-L-Rhap-(1->3)-alpha-L-Rhap-(1->]n
[3)-beta-l-rhap-(1->4)-beta-d-glcp-(1->3)-[alpha-d-glcpa-(1->6)-alpha-d-glcp-(1->2)]-alpha-l-rhap-(1->3)-alpha-l-rhap-(1->]n
A branched polysaccharide composed of a backbone of repeating β-<small>L</small>-rhamnosyl-(1→4)-β-<small>D</small>-glucosyl-(1→3)-[α-<small>D</small>-glucuronosyl-(1→6)-α-<small>D</small>-glucosyl-(1→2)]-α-<small>L</small>-rhamnosyl-(1→3)-α-<small>L</small>-rhamnosyl units, joined by (1→3) linkages. The repeating unit is that of the <em>Streptococcus pneumoniae</em> serotype 2 capsular polysaccharide.