3063bp PvuII-SalI genomic fragment that extends from -787bp relative to the e(r) transcription start site through to 390bp downstream of the e(r) last exon.
A zygotic copy of e(r)PS rescues the low viability of e(r)27-1 mutant males and females. e(r)PS has little effect on the viability of heterozygous females.
The reduced fertility of e(r)27-1 homozygous females can be rescued by e(r)PS.