A 3532 base pair fragment from the flanking non-coding or intronic region of Gprk2 is fused upstream of a Drosophila core synthetic promoter (DSCP) that is followed by sequence encoding a GAL4 driver.
ScerGAL4GMR13C06 is expressed weakly in the anterior escort cells, and strongly in the posterior escort cells. It is occasionally seen in one to two germarium cap cells.