Affiliation: | 1. Ministry of Education Protein Science Laboratory, State Key Laboratory of Biomembrane and Membrane Biotechnology, Tsinghua-Peking Joint Center for Life Sciences, Center for Structural Biology, School of Life Sciences and School of Medicine, Tsinghua University, Beijing 100084, China;2. Department of Biochemistry, Tufts University School of Medicine, 136 Harrison Avenue, Boston, MA 02111, USA;3. Department of Cell Biology, Harvard Medical School, Boston, MA 02115, USA |