Map for two sample contigs from D. virilis (Dv) in comparison with homologous regions of the D. melanogaster (Dm) genome. Shown are two contigs from D. virilis with the corresponding regions from D. melanogaster. Coding sequences (dark blue boxes) are indicated above each diagram. In the case of D. melanogaster, the thick dark blue bar indicates open reading frames (ORFs), and the thin aqua bar indicates UTRs; only ORFs are identified for D. virilis. Repeat sequences are shown below: red boxes are DNA transposon fragments, while other repetitive elements are represented as yellow boxes. (a) Contig 112 represents a clone from one of the large chromosomes of D. virilis. While the orientations of Egfr and CG10440 are the same with respect to each other, there is a large tandem repeat between the two genes in D. virilis, but not in D. melanogaster. (b) Contig 67 represents a clone from the dot chromosome of D. virilis. The structure of the genomic region is similar to the corresponding region in D. melanogaster, but there is more intergenic space in D. virilis, whereas in D. melanogaster, there are more transposable elements in the introns. All of the fosmids described here with homologous regions in D. melanogaster have been annotated in a similar manner; the maps are available in the Additional data files. Scale: one division equals 5 kb.
Slawson et al. Genome Biology 2006 7:R15 doi:10.1186/gb-2006-7-2-r15