P. stuartii O4 O-specific polysaccharide
p. stuartii o4 o-specific polysaccharide
A polysaccharide-derived antigen from <em>Providencia stuartii</em> composed of a backbone of branched tetrasaccharide repeating units comprised of alternating β-<small>D</small>-galactose and <em>N</em>-acetylglucosamine residues joined to each other via β-(1→3)- or -(1→6)-linkages, with an <em>N</em>-acetyl-<small>L</small>-asparaginyl-α-<small>D</small>-quinovosyl side-chain attached by a (1→6)-linkage to one of the galactosyl residues.