HI, DO YOU HAVE SOME EXPLICATIONS ABOUT LUCIFERASE BACKGROUND ACTIVITY DUE TO ATP CONTAMINATION . Frederic De Leener Laboratory of Cellular Biochemistry, Facults Universitaires ND de la Paix, 61, rue de Bruxelles, B-5000 Namur (Belgium). Fax: ++/32/81/72.41.35. Email: fredele at biocell.fundp.ac.be.