Cell extracts were separated by SDS-PAGE and proteins identified by western blotting, as previously described.15 (link) Antibodies used for western blot detection were as follows: Axl (C-20), pEGFR, Akt 1/2/3 and pAkt 1/2/3 (Santa Cruz), EGFR (Cell Signalling Technology, Leiden, The Netherlands) and pAxl 779 (Bio-techne). Secondary antibodies used were horseradish peroxidase (HRP)-conjugated anti-rabbit (Dako, Cambridge, UK), anti-goat and anti-mouse Igs (Promega, Southampton, UK).
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