1. School of Chemistry, Cardiff University, Park Place, Cardiff CF10 3AT, UK
2. Foundation for Advanced Molecular Evolution, 13709 Progress Boulevard, Alachua, FL 32615, USA
3. Department of Biochemistry and Molecular Biology, Dalhousie University, 5850 College Street, Halifax, Nova Scotia, Canada B3H 4R2
4. Department of Chemistry, Dalhousie University, 6274 Coburg Road, Halifax, Nova Scotia, Canada B3H 4R2
5. Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
6. Department of Chemistry, Victoria University of Wellington, Kelburn Parade, Wellington 6012, New Zealand