Fig. 1. (A) Schematic representation of the antibody-recruiting molecule (ARM). The ARM consists of a cell-binding terminus (CBT) and an antibody-binding terminus (ABT). (B) Comparison of three kinds of IgG recruitment to a target cell via regular Fab binding to an antigen (left), ARM-mediated recruitment proposed by Spiegel's group (middle), and Fc-ARM-mediated recruitment examined in this study (right).