UASt regulatory sequences drive expression of an inverted repeat.
lethal, with Scer\GAL4pnr-MD237
lethal | pupal stage, with Scer\GAL4pnr-MD237
lethal - all die during P-stage, with Scer\GAL4Mef2.PR
Expression under the control of Scer\GAL4Mef2.PR results in early pupal lethality.
Expression under the control of Scer\GAL4pnr-MD237 results in lethality (either before or at the pupal stage), depending on the insertion line used.