1. Markey Center for Structural Biology, Purdue University, West Lafayette, IN 47907, USA
2. Guangzhou East Campus Lab Center, Sun Yat-sen University, Guangzhou 510006, China
3. Johns Hopkins School of Medicine, Baltimore, MD 21205, USA
4. University of Miami School of Medicine, Miami, FL 33136, USA
5. State Key Laboratory for Biocontrol, Sun Yat-sen University, Guangzhou 510275, China