UAS regulatory sequences drive expression of a short form of Sdc lacking exon 5. The construct contains 72 silent mutations in the 375bp region that is targeted by P{UAS-Sdc.RNAi.S}, to prevent RNAi silencing by this construct (RNAi Escape Strategy Construct (RESC) method).
Expression of SdcRESC.B-C.Scer\UAS fully rescues the loss of dorsal branch fusion seen when SdcdsRNA.Scer\UAS.cSa is expressed under the control of Scer\GAL4btl.PS.