Affiliation: | aDepartment of Chemistry, School of Biomedical and Molecular Sciences, University of Surrey, Guildford, Surrey GU2 7XH, UK bSchool of Crystallography, Birkbeck College, University of London, Malet Street, London WC1E 7HX, UK cNational Institute for Medical Research, The Ridgeway, Mill Hill, London NW7 1AA, UK |