Bioinformatics Group, Department of Computer Science, University of Freiburg,Georges-Köhler-Allee 106, D-79110 Freiburg, Germany.|Bioinformatics Group, Department of Computer Science, University of Freiburg,Georges-Köhler-Allee 106, D-79110 Freiburg, Germany.|Bioinformatics Group, Department of Computer Science, University of Freiburg,Georges-Köhler-Allee 106, D-79110 Freiburg, Germany.|Bioinformatics Group, Department of Computer Science, University of Freiburg,Georges-Köhler-Allee 106, D-79110 Freiburg, Germany.