1. Department of Molecular and Systems Biology, Institute of Bioorganic Chemistry, Polish Academy of Sciences , Poznan 61-704 , Poland
2. Department of Cellular, Computational and Integrative Biology – CIBIO, University of Trento , Trento 38123 , Italy
3. Department of Ribonucleoprotein Biochemistry, Institute of Bioorganic Chemistry, Polish Academy of Sciences , Poznan 61-704 , Poland
4. Department of Structural Chemistry and Biology of Nucleic Acids, Institute of Bioorganic Chemistry, Polish Academy of Sciences , Poznan 61-704 , Poland