1. Department of Crystallography and Structural Biology
2. Institute of Physical Chemistry “Rocasolano”
3. CSIC
4. 28006 Madrid
5. Spain
6. Department of Biomedical Sciences
7. “Unidad Asociada IQM-CSIC”
8. University of Alcalá
9. Madrid
10. Laboratory for Molecular Infection Medicine
11. Department of Molecular Biology
12. Umeå Centre for Microbial Research
13. Umeå University
14. 90187 Umeå