1 Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA, USA.
2 State Key Laboratory of Molecular Biology, National Center for Protein Science Shanghai, Shanghai Science Research Center, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China.
3 Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA, USA. [email protected].