FIG. 1.

Sequence alignment of the left (top) and right (bottom) junction regions of SGI1 from S. enterica serovar Typhimurium DT104 (StSGI1) and P. mirabilis B02012 (PmSGI1) and the genomic region from P. mirabilis HI4320 containing thdF and the downstream region. The nucleotide differences between the Proteus and Salmonella thdF genes are boxed (top) as are the ones in the attB site (bottom). The nucleotide differences between the Salmonella and Proteus sequences after the right junction (bottom) are not indicated, as these sequences are not homologous. Base pair coordinates for StSGI1 are from the sequence with accession no. AF261825. Primers used to detect the junction regions are indicated by arrows.