1. MRC Human Immunology Unit, Weatherall Institute of Molecular Medicine, University of Oxford, Headley Way, Oxford OX3 9DS, UK.
2. Department of Molecular and Cellular Physiology, Stanford University School of Medicine, Stanford, CA 94305, USA.
3. Division of Structural Biology, Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford OX3 7BN, UK.
4. Center for Biomembrane Physics (MEMPHYS), University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark.
5. Institut Curie, 26 rue d’Ulm, 75248 Paris cedex 05, France.
6. Janelia Research Campus, Howard Hughes Medical Institute, 19700 Helix Drive, Ashburn, VA 20147, USA.
7. Nuffield Department of Medicine, University of Oxford, Oxford OX3 7FZ, UK.
8. Wolfson Imaging Centre, Weatherall Institute of Molecular Medicine, University of Oxford, Headley Way, Oxford OX3 9DS, UK.
9. Central Laser Facility, Rutherford Appleton Laboratory, Research Complex at Harwell, Science and Technology Facilities Council, Harwell-Oxford Campus, Didcot OX11 0FA, UK.
10. Department of Physics, King’s College London, London WC2R 2LS, UK.
11. Vertex Pharmaceuticals, 11010 Torreyana Road, San Diego, CA 92121, USA.