A 3.5kb fragment from upstream of the CrzR putative transcriptional start site is fused upstream of sequence encoding a GAL4 driver.
ScerGAL4CrzR.3.5 drives expression in 2 pairs of interneurons in the abdominal ganglion, and in the male reproductive system organs. In the abdominal ganglion, expression of ScerGAL4CrzR.3.5 is closely intermingled with the expression of Crz.