UAS regulatory sequences drive expression of a short inverted repeat.
Expression of twinHMS00493 (together with UAS-Dicer2 to enhance RNAi efficiency) under the control of Scer\GAL4bam.T:Hsim\VP16 results in tumorigenic phenotype due to spermatogonial overgrowth in adult testes, although the penetrance of the phenotype is only around 10%.