1. Department of Medical Microbiology University Medical Center Utrecht, Utrecht University Heidelberglaan 1003584 CXUtrecht The Netherlands
2. Division of Molecular Microbiology, School of Life Sciences University of Dundee Dow StreetDD1 5EHDundee UK
3. Department of Chemistry, Complex Carbohydrate Research Center The University of Georgia 315 Riverbend RoadAthens USA
4. Mycobacterial Metabolism and Antibiotic Research Laboratory The Francis Crick Institute London UK
5. Department of Medical Chemistry and Chemical Biology, Utrecht Institute Pharmaceutical Science University Utrecht Utrecht 3508 TBThe Netherlands