1. Department of Chemistry & Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, United States
2. Structural Biochemistry Laboratory, Department of Chemistry & Biochemistry, San Diego State University, 5500 Campanile Drive, San Diego, California 92182, United States
3. Faculty of Health Sciences, University of Macau, Avenida da Universidade, Taipa, Macau SAR, China