UAS regulatory sequences drive expression of 4 sgRNAs (ACTGAAAGTCCAGTGACATGGGG, ACCGTCTTGGATGACAGATCCGG, GGGACGCTTGTTAGGATTCGGGG, ATACCTAAAACCGAGCCCGTTGG), each of which targets Jra. The sgRNAs are expressed as a single polycistronic tRNA-gRNA cassette.