1. Centre for Cancer Cell and Molecular Biology, Barts Cancer Institute, Queen Mary University of London, Charterhouse Square, London EC1M 6BQ, United Kingdom
2. Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
3. National Center for Quantitative Biology of Complex Systems, Madison, Wisconsin 53706, United States
4. Department of Biomolecular Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
5. Department of Biochemistry, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, Wisconsin 53226, United States