1. Department of Chemistry; University of Oxford; Oxford UK
2. Departments of Biological Chemistry and Chemistry & Biochemistry; Howard Hughes Medical Institute; UCLA-DOE Institute; Los Angeles CA USA
3. Department of Cellular Biochemistry; Max Planck Institute of Biochemistry; Martinsried Germany
4. Institute of Molecular Biology and Biophysics; ETH Zurich; Zurich Switzerland
5. Department of Integrative Structural and Computational Biology and Skaggs Institute for Chemical Biology; The Scripps Research Institute; La Jolla CA USA