UASt regulatory sequences drive expression of an inverted repeat.
Expression of versGD12043 under the control of Scer\GAL4C587 results in germline stem cells differentiation defects and somatic cyst stem cell expansion in adult testes.
Expression under the control of Scer\GAL4pnr-MD237 results in lethality (either before or at the pupal stage), depending on the insertion line used.