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Knockdown of PARP was achieved by transfecting HeLa cells with PARP specific validated siRNA (Silencer® select Product ## s1097). Western blot analysis (Fig a) was performed using whole cell lysates from the PARP knock down cells (lane 3), non-specific scrambled siRNA transfected cells (lane 2) and untransfected cells (lane 1). The blots were probed with Anti-PARP Mouse Monoclonal Antibody (Product ## 436400, 1-2 µg/mL) and Goat anti-Mouse IgG (H+L) Secondary Antibody, HRP conjugate (Product ## 626520, 1:4000 dilution). Densitometric analysis of this western blot is shown in histogram(Fig b). Loss of signal upon siRNA mediated knock down confirms that antibody is specific to PARP.
