The promoter fragment from Ecol\lacZIlp2.pXD215-3 (-983nt to -146nt from the Ilp2 upstream region) regulates expression of a GAL4 driver.
ScerGAL4Ilp2.215-3 is expressed in a small group of 10-14 neurosecretory cells located in the dorsal part of the adult brain. These cells send neurites to arborize in the subesophageal ganglion.