(A, B) VCaP cells stably expressing control (sh-control) or p53-specific shRNA were infected with lentivirus for empty vector (EV) or deletion mutants of EZH2. Cell growth in 2D (A) and 3D (B) conditions were determined by MTS assay and measurement of clone size, respectively. Statistical significance was determined by two-tailed Student's t-test. * P < 0.05, *** P < 0.001. 