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