BCa cells were lysed for Western blotting and proteins were detected using the antibodies, GAPDH (Santa Cruz 32233), P-Ser473 AKT (Cell Signaling 4060), INPP4B (Santa Cruz 12318), Total AKT (Cell Signaling 9272), ERα (produced in our lab, SC1-1), and p27 (Santa Cruz 528). Tissue fixation and sectioning were processed as previously described [36 (link), 73 (link)]. Tissue sections were incubated with ERα antibodies (Santa Cruz, MC-20), P-Ser473 AKT (Cell Signaling 4060), INPP4B (Abcam EPR3108), Ki67 (Novocastra).
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