Fig. 6: Representation of all previously and newly characterised Shigella O-antigen gene clusters.

The names underlined correspond to those presented for the first time. Open arrows represent the location and orientation of putative genes. SSa is a chromosomal remnant rfb from S. sonnei. A b in superscript indicates that the cluster is located on a plasmid. A 1 in superscript indicates that the gene may be truncated by an IS1 in some strains.