Western blotting was performed as previously described41 (link). Briefly, whole cellular lysates were prepared by harvesting the cells in cell lysis buffer. The antibodies used were purchased from Santa Cruz Biotechnology (anti-DNMT1, anti-P-gp), Cell Signaling Technology (anti-p27kip1), Abcam (anti-nucleolin) and Sigma Aldrich (anti-β-actin).
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