ERBB2 and neoplasm: These nine murine claudin-low tumor samples were derived from six different mouse models (Brca1Co/Co;TgMMTV-Cre;p53+/-, DMBA-induced, p53-/- transplant, p53+/- IR, TgMMTV-Neu and TgWAP-T121) and overall showed similar enrichment for EMT markers and human mesenchymal and stem cell-like signatures, including decreased expression of proliferative- and luminal-associated genes (Figure S6 in Additional file 1).