Figure 2

Genomic organisation of the Drosophila RD gene clusters. Orthologous genes are colour coded consistent with the phylogeny in Fig. 1. In D. melanogaster Cyp6v1, CG1835 and hydra are annotated to fall between CG34145 and runt, Drosophila orthologs of these genes are coloured pale pink, pale green and pale yellow, respectively. A fourth gene, which is unannotated in D. melanogaster (as denoted by the dashed lines) is shown in light grey.