UASt regulatory sequences drive expression of the Tcas\Ubx a isoform.
embryonic abdominal segment 1 | ectopic, with Scer\GAL4arm.PS
embryonic metathoracic segment, with Scer\GAL4arm.PS
Expression of Tcas\UbxScer\UAS.cGa under the control of Scer\GAL4arm.PS in embryos results in the transformation of segment T3 into A1. The penetrance of this phenotype is 100%.