UASt regulatory sequences drive expression of an inverted repeat.
Depending on the insertion line used, expression under the control of Scer\GAL4Mef2.PR can result in lethality by 7 days after eclosion or adult/pharate lethality.
Cs1GD11092, Cs2HMJ22891, Scer\GAL4bam.PU has male semi-fertile phenotype