1. Biomolecular Interaction Centre and School of Biological Sciences, University of Canterbury, P.O. Box 4800, Christchurch 8140, New Zealand
2. Thomas H. Gosnell School of Life Sciences, Rochester Institute of Technology, Rochester, New York 14623-5603, United States
3. Bio21 Molecular Science and Biotechnology Institute, Department of Biochemistry and Molecular Biology, University of Melbourne, Parkville, Victoria 3010, Australia