13 copies of the lexAop site are fused upstream of EGFP which is tagged at the N-terminal end with a myristoylation signal (Tag:Myr(Src64B)). A small intron derived from the Mhc gene has been inserted between the promoter and the coding sequences. The 3' UTR (666bp) from the Autographa californica nucleopolyhedrovirus (AcNPV) p10 gene is present downstream of the EGFP sequences.