1. University of Lille, CNRS UMR8576 UGSF; Lille 59000 France
2. European Molecular Biology Laboratory, European Bioinformatics Institute (EMBL-EBI); Wellcome Trust Genome Campus Hinxton Cambridge CB10 1SD United Kingdom
3. VIB Structural Biology Research Center; VUB Pleinlaan 2 Brussels 1050 Belgium