1. Division of Structural Biology, Wellcome Centre for Human Genetics, University of Oxford, The Henry Wellcome Building for Genomic Medicine, Roosevelt Drive, Oxford OX3 7BN, U.K.
2. Alzheimer’s Research UK UCL Drug Discovery Institute, University College London, The Cruciform Building, Gower Street, London WC1E 6BT, U.K.
3. The Francis Crick Institute, 1 Midland Road, Kings Cross, London NW1 1AT, U.K.
4. Department of Cell and Developmental Biology, Laboratory for Molecular and Cellular Biology, University College London, London WC1E 6BT, U.K.