The sr239 enhancer of the sr gene is fused upstream of sequence encoding a GAL4 driver.
Drives expression in a single row of cells posterior to the en expression domain. These cells correspond to dorsal and lateral apodeme precursor cells at midembryogenesis (stage 12).
TspUAS.cCa/Scer\GAL4sr.239 rescues TspΔ6
TspUAS.cCa/Scer\GAL4sr.239 rescues TspΔ79