Map showing an overview of build 36 for 15q11-q14. The positions and orientations of the proximal eight contigs of 15q are shown as in build 36, with the HERC2 duplications (segments P, V, and Y) shown in detail. The asterisk above segment V of RP11-536P16 is to indicate that its orientation is shown as in the database. The positions of the seven gaps are shown with the approximate positions of the PWS/AS breakpoint (BP)1 to BP3. The map is divided into three parts for analysis in Figures 2, 3 and 5, as indicated. Mb, megabases.