Cell lysates were prepared with high salt lysis buffer (150 mM Tris-HCl [pH 7.9], 500 mM NaCl, 1% (w/v) Nonidet P-40). Immunoblotting was performed according to a standard procedure using the following primary antibodies: anti-GST (sc-138, Santa Cruz Biotechnology), anti-β-actin (ab6276, Abcam), anti-Aiolos (sc-101982, Santa Cruz Biotechnology), anti-GSPT1 (ab49878, Abcam), anti-DDB1 (ab97522, Abcam), anti-CUL4A (ab72548, Abcam), anti-ROC1 (ab86862, Abcam), and anti-CRBN (CRBN65 mAb, Celgene)34 (link).
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