UASt regulatory sequences drive expression of an inverted repeat.
lethal - all die before end of pupal stage, with Scer\GAL4pnr-MD237
some die during pupal stage, with Scer\GAL4pnr-MD237
Depending on the insertion line used, expression under the control of Scer\GAL4Mef2.PR can result in viable flies or adult/pharate lethality.