GMR regulatory sequences drive expression of a 950bp FspI/NheI genomic fragment containing png.
Flies expressing pngGMR.PF have no apparent eye defects.
Flies expressing both pngGMR.PF and pluGMR.PEa have completely wild-type eyes. Flies expressing both pngGMR.PF and pluGMR.PEb have completely wild-type eyes.