Western Blotting Protocol for Protein Analysis

Western blotting was performed as described previously [62 (link)]. The primary antibodies used in this study include anti-γH2A.X (1:1000, 2577S, Cell Signal Technology, Danvers, MA, USA), anti-p53 (1:500, sc-6243, Santa Cruz Biotechnology, Dallas, TX, USA), anti-p53ser15 (1:1000, 9286S, Cell Signal Technology, Danvers, MA, USA), anti-cleaved PARP1 (1:1000, 5625S, Cell Signal Technology, Danvers, MA, USA), anti-MCL1 (1:1000, 39224S, Cell Signal Technology, Danvers, MA, USA), anti-BCL2 (1:1000, 2872S, Cell Signal Technology, Danvers, MA, USA), anti-ACTIN (1:150,000, MAB1501, Millipore, Burlington, MA, USA). The secondary antibodies used were HRP-linked anti-rabbit IgG (1:4000, 7074S, Cell Signaling Technology, Danvers, MA, USA) and HRP-linked anti-mouse IgG (1:4000, 7076S, Cell Signaling Technology, Danvers, MA, USA).