Sequence encoding the ligand-inducible GAL4::GS driver is separated from Act5C promoter sequences by a y[+] containing FRT cassette.
Designed for use in mosaic analyses; mifepristone-inducible transcription blocked by FRT-flanked fragment carrying y[+]. See expression pattern for ScerGAL4Act5C.Switch.PR, carried in descendant transposon P{Act5C(-FRT)GAL4.Switch.PR}.