1. Diamond Light Source , Didcot, United Kingdom
2. Department of Physics and Astronomy, University of Missouri-Columbia , Columbia, Missouri, USA
3. Division of Structural Biology, Wellcome Trust Centre for Human Genetics, University of Oxford , Oxford, United Kingdom
4. School of Biological Sciences, University of Utah , Salt Lake City, Utah, USA
5. Department of Biochemistry, University of Oxford , Oxford, United Kingdom
6. School of Life Sciences, University of Warwick , Coventry, United Kingdom
7. Chinese Academy of Medical Sciences Oxford Institute, University of Oxford , Oxford, United Kingdom