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Locations of PI attc core sites based on S. aureus whole genomic sequence. The circle presents the composite of the staphylococcal genome with average locations of 60 min (outer scale) to assign 2.8-Mb sequences (inner scale) (modified from reference 20 with permission). Plus or minus in the parentheses indicates the insertion orientation of PIs in clockwise or counterclockwise orientation with respect to the chromosome, respectively.
