A MDA‐MB‐231 cells transfected with control or LAPTM4B siRNA were starved and stimulated with 100 ng/ml EGF for indicated time periods, followed by whole‐cell lysate harvest for immunoblotting analysis of EGFR levels.B-D Quantification of the levels of EGFR (B), pEGFR (Y1068)(C), and pAKT (S473)(D) from the analysis in (A) (mean ± SD; n = 3). 