Organization of 2B6/B7-8 region The region is situated between the break points of Df(1)S39 and the duplication Dp(1;Y)y267g24.2Y (shown by arrows). The shaded rectangles indicate the precision of rearrangement mapping. The restriction map of the region linked to the genomic sequence coordinates of FlyBase (in kb) is shown below. E-Eag I, N-Nhe I, B-Bam HI, X-Xba I, R-Eco R, H-Hpa I. In the case of those sites marked with an asterisk only ones relevant to this study are shown. The positions of genomic clones (indicated by dashed lines), genetic loci (shown with arrows) and pieces of genomic DNA used for transformation (cross-hatched lines) are presented under the restriction map. The genes a6 and b6 correspond to CG3771 and CG3100 respectively.