1. 1Departamento de Estructura de Macromoléculas, Centro Nacional de Biotecnologia (CNB-CSIC), Calle Darwin 3, 28049 Madrid, Spain
2. †Present address: School of Biosciences, Stacey Building, University of Kent, Canterbury CT2 7NJ, UK.
3. ‡Present address: Genetic Engineering Laboratory, Institute of Biotechnology (IBT-VAST), 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam.
4. 2Institute for Veterinary Medical Research, Centre for Agricultural Research, Hungarian Academy of Sciences, Budapest, Hungary
5. 3Glycoscience Group, National Centre for Biomedical Engineering Science, National University of Ireland, Galway, Ireland
6. 4Carbohydrate Signalling Group, Microbiology, School of Natural Sciences, National University of Ireland, Galway, Ireland
7. 5Departamento de Biología Estructural y Química, Centro de Investigaciones Biológicas (CIB-CSIC), Madrid, Spain
8. §Present address: Molecular Recognition and Host–Pathogen Interactions Unit, CIC bioGUNE, Bizkaia Technology Park, Building 801A, 48170 Derio, Spain.
9. ¶Present address: Ikerbasque, Basque Foundation for Science, Maria Diaz de Haro 13, 48009 Bilbao, Spain.
10. 6Departamento de Química Física-Biológica, Instituto de Química Física Rocasolano (IQFR-CSIC), Madrid, Spain
11. 7CIBER of Respiratory Diseases (CIBERES-ISCIII), Madrid, Spain
12. 8Department of Microbiology, University of Washington, Seattle, WA, USA