1. European Synchrotron Radiation Facility, 6 Rue Jules Horowitz, BP 220, 8043 Grenoble Cedex, France
2. Institute of Biophysics, University of Ulm, Albert-Einstein-Allee 11, 89081 Ulm, Germany
3. Laboratoire de Crystallogenèse et Crystallographie des Protéines, IBS, Institut de Biologie Structurale Jean-Pierre Ebel, CEA, CNRS, Université Joseph Fourier, 41 Rue Jules Horowitz, F-38027 Grenoble, France
4. Institute of Applied Physics and DFG-Center for Functional Nanostructures, University of Karlsruhe (TH), 76128 Karlsruhe, Germany
5. Department of Physics, University of Illinois at Urbana−Champaign, 1110 West Green Street, Urbana, Illinois 61801