RNA Bioinformatics Group, Department of Pharmaceutical Chemistry, Philipps-University Marburg, Germany. lechner@staff.uni-marburg.de|RNA Bioinformatics Group, Department of Pharmaceutical Chemistry, Philipps-University Marburg, Germany. lechner@staff.uni-marburg.de|RNA Bioinformatics Group, Department of Pharmaceutical Chemistry, Philipps-University Marburg, Germany. lechner@staff.uni-marburg.de|RNA Bioinformatics Group, Department of Pharmaceutical Chemistry, Philipps-University Marburg, Germany. lechner@staff.uni-marburg.de|RNA Bioinformatics Group, Department of Pharmaceutical Chemistry, Philipps-University Marburg, Germany. lechner@staff.uni-marburg.de|RNA Bioinformatics Group, Department of Pharmaceutical Chemistry, Philipps-University Marburg, Germany. lechner@staff.uni-marburg.de