A number of other reviews more comprehensively explore FcγR biology physiology, biochemistry, genetics and structure.7, 11, 12, 13, 14 Notwithstanding the recognized differences between the immunobiology of human FcγR and of rodents or nonhuman primates, animal models of FcR effector function in vivo have helped shape the strategies for the development of current therapeutic mAbs and are well reviewed.12, 15 Furthermore, humanized FcγR models will provide even greater insights into the future.16