FIG. 2.
Six different forms of S. enterica group B O-antigen gene clusters and their relationship. Positions are based on reference 8 for the Typhimurium form and on the sequence reported in this paper for the Schleissheim form. Oligonucleotide primers are indicated by arrows. The box filled with an X indicates a remnant wzyα(1-6) gene. Note that the wzy gene for the three O27− forms except for serovar Limete is located outside of the main O-antigen gene cluster and is not shown here. The suffix -p indicates that only part of an IS element is present.