WB was performed as described [49 (link)]. Antibodies used were the following: CK1α, PARP, Mcl1, Ser45 β-catenin, Ser33/37/Thr41 β-catenin, total β-catenin, Ser473 AKT, total AKT (Cell signaling Technology, MA, USA); Mdm2 (Millipore, Italy), GAPDH (Ambion, USA); α-tubulin (Sigma-Aldrich, Italy); Bak (Merck, MA, USA); Bax, p21, p53 (Becton Dickinson, Italy); Caspase 3 (Enzo Life Science, UK). Images were acquired using the Image Quant LAS 500 chemiluminescence detection system (GE Healthcare, USA). Densitometric analysis was performed with Quantity One software (Bio-Rad, Italy).
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