HED, a Human-Engineered Domain, Confers a Unique Fc-Binding Activity to Produce a New Class of Humanized Antibody-like Molecules oleh Zhiqiang Zhu, Peeyush N. Goel, Cai Zheng, Yasuhiro Nagai, Lian Lam, Arabinda Samanta, Meiqing Ji, Hongtao Zhang, Mark I. Greene