Map and orientation of IS elements around the YBT locus (black box) of P. syringae DC3000 according to the annotated genome: 1, ISPssy; 4, ISPsy4; 5, ISPsy5; 6, ISPsy6; 7, ISPsy7; 12, ISPsy12; 14, ISPsy14. The parentheses indicate disrupted IS elements.