Term Name:	S. flexneri serotype 5a O-polysaccharide (O factor 9-positive)
Synonyms:	[2)-alpha-L-Rha(III)3/4Ac-(1->2)-[alpha-D-Glc-(1->3)]-alpha-L-Rha(II)-(1->3)-alpha-L-Rha(I)-(1->3)-beta-D-GlcNAc-(1->]n, [2)-alpha-L-Rhap(III)3/4Ac-(1->2)-[alpha-D-Glcp-(1->3)]-alpha-L-Rhap(II)-(1->3)-alpha-L-Rhap(I)-(1->3)-beta-D-GlcpNAc-(1->]n
Definition:	A polysaccharide derivative comprised of a [2)-alpha-L-Rhap(III)-(1->2)-alpha-L-Rhap(II)-(1->3)-alpha-L-Rhap(I)-(1->3)-beta-D-GlcpNAc-(1->] tetrasaccharide repeat modified by the (1->3) linkage of an alpha-D-glucosyl group to the Rha(II) residue and by addition of an acetyl group to either O-3 or O-4 of many of the Rha(III) residues (35% to O-3; 25% to O-4). The structure provided is representative of that in Shigella flexneri serotype 5a and shows the most common repeating unit.
Ontology:	ChEBI [CHEBI:78714]  ( EBI )