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 early pupal lethality or late pupal lethality.
Expression under the control of Scer\GAL4pnr-MD237 results in bristle morphology defects on the notum in 0% or 10-20% of the Scer\GAL4pnr-MD237 expression domain, depending on the insertion line used.