1. School of Chemistry, University of Leeds, Leeds, LS2 9JT, UK
2. Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, UK
3. Redbrick Molecular, The Innovation Centre, 217 Portobello, Sheffield, S1 4DP, UK
4. Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, LS2 9JT, UK