The triple negative breast cancer cell line MDA-MB-231 has undergone an epithelial-to-mesenchymal transition (EMT), and lacks E-cadherin, P-cadherin, and N-cadherin expression [51,52,53]; and thus, the adhesive junctional membrane binding partner of β-catenin in MDA-MB-231 cells was heretofore unclear. This evidence concerns the gene CDH2 and triple-negative breast carcinoma.