1. Proteome Informatics Group, SIB Swiss Institute of Bioinformatics, CMU, Rue Michel-Servet 1, Geneva 1211, Switzerland
2. Computer Science Department, University of Geneva, Geneva 1227, Switzerland
3. University Lille, CNRS, Centrale Lille, UMR 9189−CRIStAL−Centre de Recherche en Informatique Signal et Automatique de Lille, Lille F-59000, France
4. Vital-IT Group, SIB Swiss Institute of Bioinformatics, Amphipole Building, Quartier Sorge, Lausanne 1015, Switzerland
5. Section of Biology, University of Geneva, Geneva 1227, Switzerland