1. Department of Theoretical Physics, Faculty of Physics, Vilnius University, Sauletekio Ave. 9-III, 10222 Vilnius, Lithuania
2. Center for Physical Sciences and Technology, Savanoriu Ave. 231, 02300 Vilnius, Lithuania
3. Institut de Biologie et Technologies de Saclay, Bât 532, Commissariat à l’Energie Atomique Saclay, 91191 Gif sur Yvette, France
4. Institut für Molekulare Biowissenschaften, Universität Frankfurt, Max-von-Laue-Straße 9, Frankfurt, Germany
5. Department of Chemical Physics, Lund University, P.O. Box 124, 22100 Lund, Sweden