MDA-MB231, together with the non-tumorigenic cell line MCF-10A, is the only breast cancer cell line to express the mesenchymal marker vimentin, while all the other three breast cancer cell lines (MCF-7, SKBR3 and MDA-MB468) express the epithelial marker E-cadherin (Supplementary Figure S1A). This evidence concerns the gene CDH1 and breast carcinoma.