1. Department of Physics, Tampere University of Technology, Tampere, Finland; Department of Biophysics, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Kraków, Poland; Laboratoire de Biophysique Moléculaire, Cellulaire et Tissulaire, UFR SMBH Université Paris 13, Paris, France; and Department of Applied Mathematics, The University of Western Ontario, London, Ontario, Canada