1. Department
of Structural Biology, Weizmann Institute of Science, Rehovot 760001, Israel
2. Diamond
Light Source, Harwell Science and Innovation Campus, Didcot, Oxfordshire OX11 0DE, England
3. Department
of Chemistry and Biochemistry, University of Bern, Freiestrasse
3, CH-3012 Bern, Switzerland
4. School
of Chemistry, Cardiff University, Park Place, Cardiff CF10 3AT, Wales