1. Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309, United States
2. The Howard Hughes Medical Institute at the Broad Institute of Harvard and MIT, 7 Cambridge Center, Cambridge, Massachusetts 02142, United States
3. Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138, United States
4. CeMM − Research Center for Molecular Medicine of the Austrian Academy of Sciences, Lazarettgasse 14, A-1090 Vienna, Austria
5. The Oulu Center for Cell-Matrix Research, Biocenter Oulu, Department of Medical Biochemistry and Molecular Biology, University of Oulu, FIN-90014, Oulu, Finland
6. Structural Genomics Consortium, University of Oxford, Old Road Campus, Roosevelt Drive, Headington OX3 7DQ, United Kingdom
7. The Botnar Research Center, NIHR, Oxford Biomedical Research Unit, Oxford OX3 7LD, United Kingdom