1. Experimental Therapeutics Centre; Agency for Science, Technology and Research (A*STAR); 31 Biopolis Way, Nanos, #03-01 Singapore 138669 Singapore
2. Institute of Chemical & Engineering Sciences; Agency for Science, Technology, and Research; 1 Pesek Road, Jurong Island Singapore 627833 Singapore
3. Novartis Institute for Tropical Diseases; Singapore Singapore
4. School of Biological Sciences; Nanyang Technological University; Singapore Singapore
5. Department of Biochemistry & Molecular Biology, Department of Pharmacology & Toxicology; Sealy Center for Structural Biology & Molecular Biophysics; University of Texas Medical Branch; Galveston TX USA