Ioannis Iliopoulos1, Sophia Tsoka1, Miguel A Andrade2, Paul Janssen1, Benjamin Audit1, Anna Tramontano3, Alfonso Valencia4, Christophe Leroy5, Chris Sander5 and Christos A Ouzounis1 
1Computational Genomics Group, Research Programme, The European Bioinformatics Institute, EMBL Cambridge Outstation, Cambridge, CB10 1SD, UK
2Biological Structures and BioComputing Programme, EMBL, Meyerhofstrasse 1, Heidelberg, Germany
3Department of Computational Biology and Chemistry, IRBM, Via Pontina, Pomezia, Rome, Italy
4Protein Design Group, National Center for Biotechnology, Cantoblanco, Madrid, Spain
5MIT Center for Genome Research, One Kendall Square, Cambridge, MA 02139, USA