Immunoblot and immunofluorescence assays were performed as previously described [29 (link)]. Antibodies employed to perform these studies were as follows: centrin (20H5 kindly provided by Dr. Salisbury’s laboratory at the Mayo Clinic); ERα and pericentrin (Santa Cruz Biotechnology, Dallas, TX, USA); AURKA (Cell Signaling Technology, Danvers, MA, USA); CD44, CD24, NOTCH1, NOTCH2, and NOTCH3 (Abcam, Cambridge, MA, USA); and β-actin and α-tubulin (Sigma-Aldrich, St. Louis, MO, USA). Secondary antibodies were obtained from Molecular Probes (Eugene, OR, USA).
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