A 3841 base pair fragment from the flanking non-coding or intronic region of CG32105 is fused upstream of a Drosophila core synthetic promoter (DSCP) that is followed by sequence encoding a GAL4 driver.
ScerGAL4GMR42B09 drives expression in somatic lineages of the developing ovary; by wandering third instar larval stage through the beginning of pupariation, expression becomes restricted to terminal filaments, germarium cap cells, and apical cells.