Fig. 2. Maps of horizontal acquisitions in the SsrB regulon. Maps show as blocks the regions of the various horizontal acquisitions identified.
The arrows indicate the orientation of open reading frames. Transposon insertion points are designated by flags that also indicate the
transposon orientation. Gene identities or homologies are shown under the blocks. Allele designations, approximate length of the horizontal
acquisitions and GC content are shown on the left. The borders of the horizontal acquisitions are designated with grey if they are known.

Themaps are drawn approximately to scale, except for Gifsy-2. Additional details can be found within the text. MS5076 designated in srfK is thesite of a previously isolated transposon insertion that resulted in a macrophage-sensitive strain (Fields et al., 1986; Baumler et al., 1994).

The Gifsy-2 map was adapted from Figueroa-Bossi and Bossi (1999).

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