For immunoblot analysis, integrin β1, 1:1000 (clone A‐4, sc‐374,429, Santa Cruz Biotechnology), β‐actin, 1:2000 (clone C4, sc‐47,778, Santa Cruz Biotechnology), IGF‐1R, 1:1000 (polyclonal, #3027, Cell Signaling Technology), EGFR, 1:1000 (clone D38B1, #4267, Cell Signaling Technology), anti‐rabbit IgG‐HRP, 1:5000 (#7074, Cell Signaling Technology), and anti‐mouse IgG‐HRP, 1:5000 (sc‐2005, Santa Cruz Biotechnology) antibodies were used. Immunoblot analysis was performed as previously described in Reference [11].
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