1. School of Chemistry, University of Melbourne, Parkville, Victoria 3010, Australia
2. Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Parkville, Victoria 3010, Australia
3. York Structural Biology Laboratory, Department of Chemistry, University of York, York YO10 5DD, U.K.
4. ACRF Chemical Biology Division, The Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria 3010, Australia
5. Department of Medical Biology, University of Melbourne, Parkville, Victoria 3010, Australia
6. Department of Microbiology and Immunology, University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria 3000, Australia