1. Institute of Biological Information Processing (IBI-7: Structural Biochemistry), Forschungszentrum Jülich, 52425 Jülich, Germany
2. Department of Physics, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland
3. Theoretical Physics and Center for Biophysics, Saarland University, Campus E2 6, 66123 Saarbrücken, Germany
4. Department of Physics, Birzeit University, Birzeit 71939, Palestine
5. Institute of Theoretical and Computational Chemistry, Heinrich Heine University Düsseldorf, 40225 Düsseldorf, Germany
6. CEITEC − Central European Institute of Technology, Masaryk University, Kamenice 753/5, Brno 625 00, Czech Republic