UAS regulatory sequences drive expression of a deleted form of run (lacking amino acid residues H410 to D453), which is tagged between amino acid residues A455 and P456 with Tag:FLAG.
Expression of runΔ6.Scer\UAS.T:Zzzz\FLAG under the control of Scer\GAL4MT14 does not result in the misdirection of the axonal projections of photoreceptors R2-R5, and thus the lamina plexus remains intact in these animals.