1. Department
of Chemistry, Emory University, Atlanta, Georgia 30322, United States
2. Department
of Chemistry, Center for Integrated Protein Science Munich (CIPSM), Technische Universität München, Lichtenbergstraße 4, 85747 Garching, Germany
3. Molecular
Therapeutics Program, Fox Chase Cancer Center, Philadelphia, Pennsylvania 19111, United States
4. Department
of Molecular Biosciences, University of Kansas, Lawrence, Kansas 66045, United States
5. Department
of Ophthalmology, Harvard Medical School, Massachusetts Eye and Ear Infirmary, Boston, Massachusetts 02115, United States
6. Department
of Microbiology and Immunobiology, Harvard Medical School, Boston, Massachusetts 02115, United States
7. Division
of Structural Biology, The University of Oxford, Headington Oxford, OX3 7BN, United Kingdom
8. Biomedical
Sciences Research Complex, University of St. Andrews, Fife Scotland, KY16 9ST, United Kingdom