UASt regulates expression of the 3' half of the dpn second intron (containing the sisRNA:4 stable intronic sequence RNA), cloned in between DsRed(Unk) and Tag:MYC.
Expression of sisRNA:4Scer\UAS.T:Hsap\MYC,T:Disc\RFP under the control of Scer\GAL4da.PU suppresses the lowered hatching rate phenotype seen in sisRNA:4MI00051/sisRNA:4MI00051 embryos.