A 3872 base pair fragment from the flanking non-coding or intronic region of rst is fused upstream of a Drosophila core synthetic promoter (DSCP) that is followed by sequence encoding a GAL4 driver.
Positive GRASP (GFP reconstitution across synaptic partners) signals between lobula plate intrinsic neurons LPi4-3 labelled with ScerGAL4GMR38G02 and vertical system neurons labelled with EcollexAVT023749 were observed.