Fig. 2. Alignment of the pros enhancer from four Drosophila species. CLUSTAL alignment of sequences from the core-enhancer and the mini-enhancer used in experiments. Sequences conserved in all four species (D. melanogaster, D. simulans, D. pseudoobscura, D. virilis) are marked below the alignment by red asterisks. Long stretches of sequence found in only one species are not included, and their lengths are indicated by numbers of bases and a species identifier, below the alignment. Putative factor-binding sites are colored. These are: Su(H), green; Yan/Pnt, red; So/Eya, orange; Gl, purple; Lz, blue; Svp, cyan.