To assess the in vitro potency of effector cell-redirected lysis by this same panel of anti-P-cadherin/anti-CD3 DART molecules, P-cadherin-expressing tumor cells were incubated with increasing concentrations of DART proteins and with either a 10 or 30-fold excess of peripheral blood mononuclear cells (PBMC) or purified T cells as effector cells. Here, CDH3 is linked to neoplasm.