FIG. 3.

Comparison of part of the mga locus in M1 and the SPy0778-rpsU region in M57 and other strains. The shaded areas in the SPy0778-rpsU region represent homologous regions. The mottled area between the regions surrounding the sic gene in M1 and the regions surrounding the crs57 gene in M57 shows a high level of similarity. This area also includes one of the inverted repeats of IS1562. The downward arrowheads beneath the mottled rectangle suggest that there was horizontal acquisition of this region from M1. The horizontal arrows show the relative positions of the ABC-F2 and rpsU-R1 primers used to amplify SPy0778-rpsU regions (the sequences are given in the text). The figure is not to scale.