ScerGAL4GSGB15-1 drives mifepristone-inducible expression primarily neuronally. Weak expression is observed in the ventral nerve cord in a single A1-7 dorsal motor neuron at the dorsal midline, ~5 lateral cells, and ~5 ventral cells per hemisegment. Expression is observed in lateral longitudinal processes in VL FasII axon tract. Moderate expression is observed in the mushroom bodies. Weak expression is observed at type Is boutons at neuromuscular junctions.