1 MOE Key Laboratory of Protein Sciences, Beijing Advanced Innovation Center for Structural Biology, School of Life Sciences, Tsinghua University, 100084, Beijing, China.
2 MOE Key Laboratory of Protein Sciences, School of Pharmaceutical Sciences, MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Tsinghua University, 100084, Beijing, China.
3 Institute for Immunology and School of Medicine, Tsinghua University, 100084, Beijing, China.
4 MOE Key Laboratory of Protein Sciences, School of Pharmaceutical Sciences, MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Tsinghua University, 100084, Beijing, China. yrao@mail.tsinghua.edu.cn.
5 MOE Key Laboratory of Protein Sciences, Beijing Advanced Innovation Center for Structural Biology, School of Life Sciences, Tsinghua University, 100084, Beijing, China. wwu@mail.tsinghua.edu.cn.