1. Institute
of Biotechnology, University of Helsinki, Biocenter 3 (Viikinkaari 1), PB
65, Helsinki 00014, Finland
2. Department
of Physics, Tampere University of Technology, Korkeakoulunkatu 3, Tampere 33720, Finland
3. Department
Chemie, Technische Universität München, Lichtenbergstraße 4, D-85748 Garching, Germany
4. Department
of Biochemistry, University of Mississippi Medical Center, Jackson, Mississippi 39216, United States
5. Department
of Theoretical Biophysics, Max Planck Institute of Biophysics, Max-von-Laue-Straße
3, 60438 Frankfurt
am Main, Germany