Immunoblotting was performed essentially as described7 (link), except that the Westar ηC Ultra 2.0 chemiluminescence substrate (Cyanagen, Bologna, Italy) was employed. Rabbit monoclonal anti-ATP1B3 and rabbit polyclonal anti-transferrin receptor antibodies were purchased from Abcam (Cambridge, England). Mouse monoclonal anti β-catenin antibody was obtained from Santa Cruz Biotechnology, Inc. (Dallas, TX, USA). Rabbit monoclonal PI3 Kinase p100α, rabbit polyclonal AKT, rabbit polyclonal phospho-AKT (Ser473), rabbit monoclonal GSK3β, rabbit polyclonal phospho-GSK3β (Ser9) and phospho-Histone H2A.X (Ser139) antibodies were obtained from Cell Signaling Technology, Inc. (Beverly, MA, USA). Monoclonal anti-β-actin antibody was purchased from Sigma (St. Louis, MO, USA).
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