Transformation MappingoftheRegulatory Elements ofthe Ecdysone-Inducible P1GeneofDrosophila melanogaster

betweenthem.We are indebted to Antonia Kropfinger and Hugh Brock forrevision ofthe manuscript.This work was supported by grants from the CNRS, theINSERM,andthe FondationpourlaRechercheMedicaletoJ.-A.L.REFERENCES1. Beato, M. 1989. Gene regulation by steroid hormones. Cell56:335-344.2. Belyaeva, E. S., M.0. Protopopov, E.