ScerGAL4GSG4102 drives mifepristone-inducible expression primarily neuronally. Strong ventral nerve cord expression is observed in 5 dorsal midline cells per hemisegment, including A1-7 dorsal motor neurons. Ventral nerve cord expression is also observed in 15+ lateral cells per hemisegment, and 10-15 ventral cells per hemisegment including 2-3 ventral midline cells. Weak expression is observed in longitudinal processes project along DM and DL FasII axon tracts. lateral to CI tracts, and along the CL tract. Moderate expression is observed in cells scattered through the brain. Weak expression is observed in chordotonal organs. Moderate expression is observed in type I boutons of most neuromuscular junctions.