1. Institute of Biophysics of the Czech Academy of Sciences Královopolská 135 61265 Brno Czech Republic
2. National Centre for Biomolecular ResearchFaculty of ScienceMasaryk University Kamenice 5 62500 Brno Czech Republic
3. Department of Integrative Structural and Computational BiologyThe Scripps Research Institute La Jolla CA 92037 USA
4. Regional Centre of Advanced Technologies and MaterialsFaculty of SciencePalacký University Šlechtitelů 27 78371 Olomouc Czech Republic
5. Université de StrasbourgCNRS, Architecture et Réactivité de l'ARN, UPR9002 F-67000 Strasbourg France