A 2314 base pair fragment from the flanking non-coding or intronic region of m4 is fused upstream of a Drosophila core synthetic promoter (DSCP) that is followed by sequence encoding a GAL4 driver.
ScerGAL4GMR27G05 is a pan-lamina monopolar neuron driver.
ScerGAL4GMR27G05 drives expression in lamina neurons that project into the medulla.