Fig. 7. Genomic region surrounding rib. (A) rib maps to a small interval of the 56C region (gray) by complementation analysis with overlapping deficiencies in the region (Df(2R)P34, Df(2R)F7, Df(2R)GC8, and Df(2R)GC10). coracle (cora) and wbl also map within the rib region, whereas enabled (enb) maps to a distinct interval (Gertler et al., 1995). (B) Two Celera Genomics DNA contigs span the rib region. AE003796 begins distal to the region, ending at nt 268,419, which overlaps with the first 60 nt of AE003797; AE003797 continues proximally, ending outside of the region. Breakpoints for Df(2R)GC10 and Df(2R)P34 are shown as hatched boxes. 1, 2, 3, 4, 5 and 6 are predicted genes in the region. Genes are depicted as arrows, which indicate the direction and approximate size of the transcription unit. gene 6 maps completely outside of deficiency Df(2R)P34. EP(2)2445 is the viable P-element insertion line used to generate the lethal line EP(2)24451, which deletes DNA from enb to cora and does not affect rib function, leaving only three candidates. Since wbl complements rib (Table 1), rib is gene 4 or gene 5. Proximal (P) and distal (D) is relative to the centromere.

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