A 3155 base pair fragment from the flanking non-coding or intronic region of CadN is fused upstream of a Drosophila core synthetic promoter (DSCP) that is followed by sequence encoding a GAL4 driver.
ScerGAL4GMR31F10 drives expression in a single cell, the T1 neuron, in each of the 800 columns that comprise the medulla of the adult optic lobe.