1. University of Lille, CNRS UMR8576 UGSF, F-59000 Lille, France
2. Interuniversity Institute of Bioinformatics in Brussels, ULB/VUB, B-1050 Brussels, Belgium
3. Structural Biology Research Centre, VIB, B-1050 Brussels, Belgium
4. Structural Biology Brussels, Vrije Universiteit Brussel, B-1050 Brussels, Belgium