1. Department of New Materials and Biosystems, Max Planck Institute for Intelligent Systems, Stuttgart, Germany
2. Department of Biophysical Chemistry, Institute of Physical Chemistry, University of Heidelberg, Heidelberg, Germany
3. Institute for Advanced Study and Center for Integrated Protein Science, Department of Chemistry, Technical University Munich, Garching, Germany
4. Department of Molecular Cell Biology, Weizmann Institute of Science, Rehovot, Israel