1. School of Chemistry; University of Manchester; Manchester Institute of Biotechnology; 131 Princess Street Manchester M17DN UK
2. York Structural Biology Laboratory; Department of Chemistry; University of York; Heslington York YO10 5DD UK
3. Groton Laboratories; Pfizer Worldwide Research and Development; 445 Eastern Point Road Groton CT 06340 USA
4. Sandwich Laboratories; Pfizer Worldwide Research and Development; Discovery Park Sandwich, Kent CT13 9NJ UK
5. School of Chemistry; University of Manchester; Manchester M13 9PL UK