Bioinformatics Group, Department of Computer Science, University of Leipzig, Leipzig, Germany. dominic@bioinf.uni-leipzig.de|Bioinformatics Group, Department of Computer Science, University of Leipzig, Leipzig, Germany. dominic@bioinf.uni-leipzig.de|Bioinformatics Group, Department of Computer Science, University of Leipzig, Leipzig, Germany. dominic@bioinf.uni-leipzig.de|Bioinformatics Group, Department of Computer Science, University of Leipzig, Leipzig, Germany. dominic@bioinf.uni-leipzig.de|Bioinformatics Group, Department of Computer Science, University of Leipzig, Leipzig, Germany. dominic@bioinf.uni-leipzig.de|Bioinformatics Group, Department of Computer Science, University of Leipzig, Leipzig, Germany. dominic@bioinf.uni-leipzig.de