Figure 4. Physical map comparison between S. gallinarum strains 287/91 and SARB21.

The map of SARB21 was reported previously [21]; here letter designations for the cleavage fragments of SARB21 have been changed according to the homologues in strain 287/91 for the convenience of comparison. Note that all XbaI, I-CeuI and AvrII (maps from top to bottom) cleavage sites are conserved in the two strains except the AvrII site between fragments F and J in 287/91 (open arrow), which is missing from SARB21. Lines with solid arrowheads at both ends indicate the ranges of genomic inversions via rrn-mediated recombination between the two strains and filled arrows indicate recombination sites that have resulted in the translocation of I-CeuI fragment D.