Duplication breakpoint (53C breakpoint of Dp(2;2)SM5) within Pgant9. The 5' (proximal) end of this breakpoint corresponds to 2R:16 ,682,351 and the 3' (distal) end corresponds to 2R:16 ,682,827 (release 6 coordinates), meaning that 475bp of genomic sequence is deleted at this breakpoint.