UASt regulatory sequences drive expression of a chimeric robo1::robo2 protein (composed of robo2 amino-acid residues 84-280 and robo1 amino acid residues 253-1395) fused with a Tag:SS(wg) signal sequence and an N-terminal Tag:HA-tag.
Mis-expression of robo::leaR2I1+2.Scer\UAS.T:Ivir\HA1,T:SS-wg under the control of Scer\GAL4elav.PLu results in thickened commissures and promotes ectopic midline crossing of Fas2-positive axon tracts.
robo1::robo2R2I1+2.UAS.Tag:HA,Tag:SS(wg)/Scer\GAL4elav.PLu is a suppressor of abnormal neuroanatomy phenotype of commΔe39
robo1::robo2R2I1+2.UAS.Tag:HA,Tag:SS(wg)/Scer\GAL4elav.PLu is a suppressor of symmetrical commissure phenotype of commΔe39
Expression of robo1::robo2R2I1+2.Scer\UAS.T:Ivir\HA1,T:SS-wg under the control of Scer\GAL4elav.PLu strongly suppresses the loss of commissure phenotype of homozygous commE39 embryos.