Western blot analysis using Manti-p53 cln. X77 antibody at 10 μg/ml on HCT116 cell lysate (1), HCT116 cell lysate activated with adriamycin (2), p21-/- cell lysate (3), P21-/- cell lysate activated with ADR (4) and p53-/- activated with ADR. ADR activates p53 in cells. Also shown is a graphic representation of the epitope location.