UAS regulatory sequences drive expression of ftz coding sequences with a mutation of the hox-like LRALL motif to LRAAA and of the Exd/Pbx binding FNWS domain to YPPWLK (as found in the Folsomia degenerate motif).
Expression of ftzLRAAA.YPPWLK.Scer\UAS in developing imaginal discs under the control of Scer\GAL4Dll-md23 transformed antennae to complete legs with five distinguishable segments and a malformed A3 segment.