Elotuzumab (anti-SLAMF7, BMS-901608, PDL063, HuLuc63) is a humanized monoclonal antibody that binds human signaling lymphocytic activation molecule F7 (hSLAMF7, also known as CS1, CD319, or CRACC). Elotuzumab shows a dual mechanism of action that includes the direct activation of natural killer (NK) cells and the induction of NK cell–mediated antibody-dependent cellular cytotoxicity.