1. School of Biological Sciences, University of Sydney, NSW 2006, Australia.
2. Department of Chemistry and Biomolecular Sciences, Macquarie University, NSW 2109, Australia.
3. School of Chemistry, University of Sydney, NSW 2006, Australia.
4. School of Biotechnology and Biomolecular Science, University of New South Wales, NSW 2052, Australia.
5. Department of Biology I, University of Munich, D-80638 Muenchen, Germany.