1. CNRS, UMR5075, Institut de Biologie Structurale Jean-Pierre Ebel, 41 rue Jules Horowitz, 38027 Grenoble Cedex 1, France, CEA, DSV, Grenoble F-38027, France, Université Joseph Fourier, Grenoble, F-38000, France, European Synchrotron Radiation Facility, 6 Rue Jules Horowitz, BP 220, 38043 Grenoble Cedex, France, Institute of Applied Physics and Center for Functional Nanostructures, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany, and Department of Physics, University of Illinois at...