A 3817 base pair fragment from the flanking non-coding or intronic region of nAcRalpha-96Aa is fused upstream of a Drosophila core synthetic promoter (DSCP) that is followed by sequence encoding a GAL4 driver.
ScerGAL4GMR23A05 drives expression in a subset of interneurons in the first instar larva. The number of labelled neurons is reduced to one pair per segment by the end of the third instar larval stage.