1. School of Pharmacy, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, UK
2. Centre for Molecular and Structural Biochemistry, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, UK
3. School of Chemistry, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, UK
4. School of Biological Sciences, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, UK