1. Department of Biochemistry, University of Oxford, Oxford OX1 3QU, UK.
2. Dunn School of Pathology, University of Oxford, Oxford OX1 3RE, UK.
3. Central Oxford Structural Molecular Imaging Centre, University of Oxford, South Parks Road, Oxford OX1 3RE, UK.
4. Center for Structural Biology, Center for Cancer Research, National Cancer Institute, Frederick, MD 21702, USA.
5. Structural Biology, The Rosalind Franklin Institute, Harwell Science and Innovation Campus, Didcot, UK.
6. Division of Structural Biology, The Wellcome Centre for Human Genetics, University of Oxford, Oxford, UK.
7. Protein Production UK, The Research Complex at Harwell, Harwell Science and Innovation Campus, Didcot, UK.
8. The Kavli Institute for Nanoscience Discovery, University of Oxford, Oxford OX1 3QU, UK.