2.9bk EcoRI-NaeI fragment (0 to +2.9, FBrf0046127) covering the E(spl)m5-HLH transcribed region, 940bp downstream of the putative polyadenylation signal and 1073bp upstream of the transcription start site.
Transgene can, to some extent, rescue the neurogenic phenotype of Df(3R)E(spl)-rv27 homozygotes.