1. Department of Biology and Center for Integrated Protein Science, Ludwig Maximilians University Munich, 82152 Planegg-Martinsried, Germany
2. King’s College London, Randall Division of Cell and Molecular Biophysics, New Hunt’s House, Guy’s Campus, London SE1 1UL, England, UK
3. Institute of Physical Chemistry, Friedrich-Schiller University Jena, 07743 Jena, Germany
4. Institute of Photonic Technology, 07745 Jena, Germany