1. Oxford Protein Informatics Group, Department of Statistics, University of Oxford, Oxford OX1 3LB, U.K.
2. Structural Genomics Consortium, University of Oxford, Oxford OX3 7DQ, U.K.
3. Department of Chemistry, University of Oxford, Oxford OX1 3TA, U.K.
4. Diamond Light Source Ltd., Didcot OX11 0DE, U.K.
5. Department of Engineering, University of Oxford, Oxford OX1 3PJ, U.K.
6. Alan Turing Institute, London NW1 2DB, U.K.