UAS regulatory sequences drive expression of a genomic Raf fragment isolated from the Raf⁹²⁶ flies (this allele contains a 17bp deletion beginning at the 479th nucleotide of the Raf protein coding region, resulting in a frameshift, leading to a premature stop codon before the second and third conserved domains, as well as deleting the majority of the first conserved domain). The mutant mCherry coding sequence is tagged with mCherry.