UAS regulatory sequences drive expression of robo1 lacking the CC2 domain (residues 1104-1119 are deleted).
robo1ΔCC2.UAS is an enhancer of visible phenotype of AblUAS.cFa, Scer\GAL4GMR.PF
robo1ΔCC2.UAS is an enhancer of ommatidium phenotype of AblUAS.cFa, Scer\GAL4GMR.PF
robo1ΔCC2.UAS/Scer\GAL4elav.PLu partially rescues robo15