Updated sequence information for this Drosophila species is no longer provided by FlyBase. Gene model annotations for this species are now updated and maintained at NCBI, using the gnomon automated annotation pipeline. See the NCBI page ‘Eukaryotic genomes annotated at NCBI’.
The FlyBase BLAST tool will continue to support queries against the reference genome of this species, but not queries against annotated transcripts or proteins. For the current release, there is no JBrowse or GBrowse view of the gene model annotations for this species.
The FlyBase archived release FB2017_05 includes the last NCBI annotation update for this species that was imported into FlyBase. That sequence data can be accessed from archived gene reports, via the archived GBrowse tool, and via archived bulk-data downloads.
rDNA, rRNA
Please Note This section lists cDNAs and ESTs that fall within the genomic extent of the gene model, which may include cDNAs and ESTs of genes within introns, or of overlapping genes. Please see JBrowse for alignment of the cDNAs and ESTs to the gene model.
For each fully sequenced cDNA the DGRC maintains various forms of the cDNA (e.g tagged or untagged) in several different host vectors for subsequent cloning and expression in Drosophila and Drosophila cell lines.
The internal transcribed spacer regions of the bb locus of a number of Drosophila species have been analysed and compared.
12,500 copies of 240bp nontranscribed spacer unit are carried on the tip of the long arm of the Y chromosome. In Dsim\bb/Y males the short bristle phenotype is enhanced by the presence of the Y chromosome. Results suggest that the 12,500 nontranscribed spacer units on the Y chromosome are responsible for this biological effect by competition for a protein factor essential for normal levels of rDNA transcription at the X-linked locus.
The slowly evolving sequences within the rDNA promoter region, external transcribed spacers and 5' upstream sequences, have been identified.
