Interdisciplinary Center for Bioinformatics and Bioinformatics Group, Department of Computer Science, University Leipzig, 04107 Leipzig, Germany.|Interdisciplinary Center for Bioinformatics and Bioinformatics Group, Department of Computer Science, University Leipzig, 04107 Leipzig, Germany.|Interdisciplinary Center for Bioinformatics and Bioinformatics Group, Department of Computer Science, University Leipzig, 04107 Leipzig, Germany.