F Luciferase reporter constructs containing RE1, RE2, RE1mut or RE2mut were transfected into p53-/- HCT116 cells together with control (PRK5-flag vector) or p53 expression vector (PRK5-flag p53) for 48 hours. Renilla vector pRL-CMV was used as a transfection internal control. Relative levels of luciferase are shown. Data represent three independent experiments. Protein expression is shown G Luciferase reporter constructs containing RE1, RE2, RE1mut or RE2mut were transfected into HEK293T cells together with control (PRK5-flag vector) or p53 expression vector (PRK5-flag p53) for 48 hours. Renilla vector pRL-CMV was used as a transfection internal control. Relative levels of luciferase are shown. Protein expression is shown. 