1. Guangzhou Municipal and Guangdong Provincial Key Laboratory of Protein Modification and Degradation & Molecular Target and Clinical Pharmacology the State Key Laboratory of Respiratory Disease School of Pharmaceutical Sciences & the Fifth Affiliated Hospital Guangzhou Medical University Guangzhou Guangdong 511436 P. R. China
2. Shanghai Institute for Advanced Immunochemical Studies & School of Life Science and Technology ShanghaiTech University Shanghai 201210 P. R. China
3. Department of Chemistry Scripps Research Institute La Jolla CA 92037 USA