Paul Janssen1,3, Benjamin Audit2, Ildefonso Cases2, Nikos Darzentas2, Leon Goldovsky2, Victor Kunin2, Nuria Lopez-Bigas2, José Manuel Peregrin-Alvarez2, José B Pereira-Leal2, Sophia Tsoka2 and Christos A Ouzounis2 
1
Centre d'Ingénierie des Protéines (CIP), Université de Liège, 4000 Liège, Belgium
2
Computational Genomics Group, The European Bioinformatics Institute, EMBL Cambridge Outstation, Cambridge CB10 1SD, UK
3
Laboratory of Microbiology, Belgian Nuclear Research Centre, SCK/CEN, Boeretang 200, B-2400-MOL, Belgium