EGF and breast carcinoma: Phosphorylation of β-catenin at Tyr654 and Tyr142 reduces its affinity for E-cadherin and α-catenin binding, respectively (Roura et al., 1999; Piedra et al., 2003), which could be responsible for the dissociation of E-cadherin from actin cytoskeleton following EGF treatment in breast cancer cells MDA-MB-468 (Hazan and Norton, 1998).