Cells lysates (20–40µg protein) were separated under reducing conditions by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE, Bio-Rad Laboratories, Hercules, CA,) and transferred onto a Polyvinylidene fluoride (PVDF) membranes (PerkinElmer Life Science, Waltham, MA) by semi-dry electroblotting. Membranes were probed with rabbit anti-human A20/TNFAIP3 (Abcam), Ser-536 Phospho-P65 (Cell Signaling, Danvers, MA), Ser-32 phospho-IκBα, (Cell Signaling) and, GAPDH (Calbiochem/ EMD Biosciences, Gibbstown, NJ) followed by appropriate secondary HRP-conjugated antibodies (Thermo Scientific, Rockford, IL). Protein bands were detected with an enhanced chemiluminescence kit (PerkinElmer Life Science) followed by exposure to an autoradiography film(5 (link), 9 (link)).