1. Department of Biology and Biochemistry, University of Houston, Houston, TX
2. Biomolecular Interaction Centre and School of Biological Sciences, University of Canterbury, Christchurch, New Zealand
3. Department of Biochemistry and Molecular Biology, Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Parkville, Australia
4. Department of Microbiology and Molecular Genetics, Michigan State University, East Lansing, MI