Affiliation: | 1 Biomolecular Research, Structural Biology, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland 2 Physical Chemistry, ETH Zurich, CH-8093 Zürich, Switzerland 3 Wellcome Trust Centre for Cell-Matrix Research, Faculty of Life Sciences, University of Manchester, Manchester M13 PT, United Kingdom 4 Department of Biochemistry, School of Life Sciences, University of Sussex, Falmer BN1 9QG, United Kingdom 5 M.E. Müller-Institute for Structural Biology, Biozentrum, University of Basel, CH-4056 Basel, Switzerland 6 Electron Microscopy ETH Zürich (EMEZ), ETH, CH-8093 Zürich, Switzerland 7 Swiss Light Source, Paul Scherrer Institut, CH-5232 Villigen, Switzerland |