Receptor binding and complex structures of human ACE2 to spike RBD from omicron and delta SARS-CoV-2

Pengcheng Han, Linjie Li, Sheng Liu, Qisheng Wang, Di Zhang, Zepeng Xu, Pu Han, Xiaomei Li, Qi Peng, Chao Su, Baihan Huang, Dedong Li, Rong Zhang, Mingxiong Tian, Lutang Fu, Yuanzhu Gao, Xin Zhao, Kefang Liu, Jianxun Qi, George F. Gao, Peiyi Wang