The breakpoint sequences for the Brca247 imprecise excision deletion are Left breakpoint: CCTTCATGTT/cttggccata Right breakpoint: agttggtggt/CGTTGATACT The left breakpoint corresponds to the P{SUPor-P}KG02287 insertion site and the right breakpoint maps to 2R:20415891 . The total deletion size is 2257 bp. P element sequences remain at the site of the excision.