Ine serum (FBS, Invitrogen, Carlsbad, CA) and 1 penicillin, streptomycin and amphotericin (Omega Scientific), with the addition of 5 g/ml of bovine insulin (Sigma-Aldrich, St. Louis, MO). All cell lines were mycoplasma free when periodically tested using a Mycoalert assay (Lonza, Rockland, ME).Oncogenic analysis of cell linesCell lines were analyzed for known oncogenic activating mutations and de