Bioinformatics Group, Department of Computer Science, 79110 Freiburg and Centre for Biological Signalling Studies (BIOSS), 79104 Freiburg, University of Freiburg, Germany.|Bioinformatics Group, Department of Computer Science, 79110 Freiburg and Centre for Biological Signalling Studies (BIOSS), 79104 Freiburg, University of Freiburg, Germany.|Bioinformatics Group, Department of Computer Science, 79110 Freiburg and Centre for Biological Signalling Studies (BIOSS), 79104 Freiburg, University of Freiburg, Germany.|Bioinformatics Group, Department of Computer Science, 79110 Freiburg and Centre for Biological Signalling Studies (BIOSS), 79104 Freiburg, University of Freiburg, Germany Bioinformatics Group, Department of Computer Science, 79110 Freiburg and Centre for Biological Signalling Studies (BIOSS), 79104 Freiburg, University of Freiburg, Germany.