To verify that compounds identified by the hPRLR-expressing BaF3 lymphocytes are active in human BCC with endogenous PRLR, the third bioassay used T47D cells stably transfected with a luciferase reporter driven by a PRL-responsive (23X GAS element) promoter (T47D-GAS/luc). The gene discussed is PRLR; the disease is skin basal cell carcinoma.