1. GSK, Medicines Research Centre, Stevenage, Hertfordshire SG1 2NY, U.K.
2. Department of Chemistry, Molecular Sciences Research Hub, Imperial College London, 82 Wood Lane, London W12 0BZ, U.K.
3. Department of Biochemistry, School of Biological and Behavioural Sciences, Queen Mary University of London, 327 Mile End Road, London E1 4NS, U.K.
4. The Francis Crick Institute, 1 Midland Road, London NW1 1AT, U.K.