FIG. 1.

OPS gene cluster of Y. enterocolitica O:9. The gene cluster figures were generated from the sequence files under the accession numbers AJ605741 for Y. enterocolitica O:9 and AF047478 for B. melitensis using the ggnVIEW sequence file viewer (http://colibase.bham.ac.uk/cgi-bin/fileprepare.cgi). The identified and predicted promoter locations of the O:9 gene cluster are indicated with bent arrows. The orf1 gene (Table 3), present in the reverse direction upstream of the manC gene, is not shown. The regions of homology between the gene clusters are indicated with shadowed quadrangles, and the percentages of identity between the predicted amino acid sequences are given.