Bioinformatics Group, University of Freiburg, Georges-Köhler-Allee 106, 79016 Freiburg, Germany. cpsp@informatik.uni-freiburg.de|Bioinformatics Group, University of Freiburg, Georges-Köhler-Allee 106, 79016 Freiburg, Germany. cpsp@informatik.uni-freiburg.de|Bioinformatics Group, University of Freiburg, Georges-Köhler-Allee 106, 79016 Freiburg, Germany. cpsp@informatik.uni-freiburg.de|Bioinformatics Group, University of Freiburg, Georges-Köhler-Allee 106, 79016 Freiburg, Germany. cpsp@informatik.uni-freiburg.de|Bioinformatics Group, University of Freiburg, Georges-Köhler-Allee 106, 79016 Freiburg, Germany. cpsp@informatik.uni-freiburg.de|Bioinformatics Group, University of Freiburg, Georges-Köhler-Allee 106, 79016 Freiburg, Germany. cpsp@informatik.uni-freiburg.de