1. Université de Bordeaux, IECB; ARNA Laboratory; 33600 Pessac France
2. Inserm, U1212; ARNA Laboratory; 33000 Bordeaux France
3. CNRS, UMR 5320; ARNA Laboratory; 33400 Talence France
4. Division of Biophysics; Institute of Experimental Physics; University of Warsaw; Warsaw Poland