Western immunoblotting was accomplished as previously described (25 (link),26 (link)) using the following primary antibodies: anti-caspase-9 (Assay Designs); anti-FLAG and anti-β-actin (Sigma); anti-p65, anti-NF-κB2, anti-IκBα, phospho-IκBα, anti-laminA/C, anti-α-tubulin, anti-NIK, anti-RIP1, anti-cIAP1, anti-cIAP2, anti-Apaf1, anti-myc (Cell Signaling Technology); anti-K48, anti-Ki-67, and K63-linkage specific ubiquitin, and anti-Ki-67 (Abcam). Secondary antibodies were horseradish peroxidase-conjugated anti-rabbit IgG and anti-mouse IgG antibodies (Cell Signaling Technology).