UAS regulatory sequences and a minimal Hsp70 promoter (derived from the pUASTLOTattB vector) are fused upstream of sequence that encodes scFv(antiHA-X15F11) tagged with mEGFP(A206K). (Generated by P1cre-mediated excision of the lexAop regulatory sequences present in P{lexAop-UAS-scFv(antiHA-X15F11).mEGFP}).