The RMCE cassette present in TI{TI}SynjKO.P has been has been replaced by cDNA sequence (followed by a polyA tail) encoding mutant Synj carrying a R258Q amino acid replacement (this variant is equivalent to a pathogenic variant in the orthologous human gene).
SynjR258Q is rescued by SynjUAS.cVa/Scer\GAL4GH146