S. flexneri serotype 6 O-polysaccharide (O factor 9-positive)
s. flexneri serotype 6 o-polysaccharide (o factor 9-positive)
A polysaccharide derivative comprised of a [2)-α-<small>L</small>-Rha<em>p</em><small><sup>III</small></sup>-(1→2)-α-<small>L</small>-Rha<em>p</em><small><sup>II</small></sup>-(1→3)-β-<small>D</small>-Gal<em>p</em>A-(1→3)-β-<small>D</small>-Gal<em>p</em>NAc-(1→] tetrasaccharide repeat modified by the addition of an acetyl group to either O-3 or O-4 of many of the Rha<small><sup>III</small></sup> residues (60% to O-3; 30% to O-4). The structure provided is representative of that in <em>Shigella flexneri</em> serotype 6 and shows the most common repeating unit.