1. Instituto Biofisika, Centro Mixto Consejo Superior de Investigaciones Científicas-Universidad del País Vasco/Euskal Herriko Unibertsitatea (CSIC, UPV/EHU), Barrio Sarriena s/n, Leioa, Bizkaia 48940, Spain
2. Departamento de Bioquímica, Universidad del País Vasco, Barrio Sarriena s/n, Leioa, Bizkaia 48940, Spain
3. Department of Synthesis and Structure of Biomolecules, Institute of Chemical Synthesis and Homogeneous Catalysis (ISQCH), University of Zaragoza-CSIC, 50009 Zaragoza, Spain
4. Unité de Microbiologie Structurale (CNRS URA 2185), Institut Pasteur, 25 rue du Dr. Roux, 75724 Paris Cedex 15, France
5. Structural Biology Unit, CIC bioGUNE, Bizkaia Technology Park, 48160 Derio, Spain
6. Department of Biochemistry and Biophysics, Stockholm University, 106 91 Stockholm, Sweden
7. Department of Chemistry, Umeå University, 901 87 Umeå, Sweden
8. Unité de Biochimie des Interactions Macromoléculaires (CNRS UMR 3528), Institut Pasteur, 25 rue du Dr. Roux, 75724 Paris Cedex 15, France
9. IKERBASQUE, Basque Foundation for Science, 48013 Bilbao, Spain
10. Glycobiology Unit, Institute of Biocomputation and Physics of Complex Systems (BIFI), University of Zaragoza, Campus San Francisco, 50009 Zaragoza, Spain