1. Lab.
Jean Perrin, CNRS UMR 8237, UPMC Université Paris 6, 4 place Jussieu, 75252 Paris Cedex 05, France
2. Institute
of Physics, Faculty of Mathematics and Physics, Charles University in Prague, Ke Karlovu 5, 121 16 Prague 2, Czech Republic
3. Unité
de Chimie des Biomolécules, Institut Pasteur, UMR CNRS 3523, 75724 Paris, France
4. ER12, UPMC Université Paris 06, 4 place Jussieu, 75252 Paris Cedex 05, France