ERBB2 and breast carcinoma: In contrast, MET was expressed at substantial levels in basal‐like breast cancer cell lines MDA‐MB‐468, BT549, HS578T, MDA‐MB‐231, and HCC1143, as well as the HER2‐enriched cell line HCC1954 and in the immortalized breast epithelial cell line MCF10A (Figs 2E and S4B).