1. Yusuf Hamied Department of Chemistry University of Cambridge Lensfield Road Cambridge CB2 1EW UK
2. Department of Chemistry Manchester Institute of Biotechnology University of Manchester 131 Princess Street Manchester M1 7DN UK
3. Department of Chemistry The Skaggs Institute for Chemical Biology The Scripps Research Institute La Jolla CA 92-37 USA
4. Tuberculosis Research Section National Institute of Allergy and Infectious Diseases Laboratory of Clinical Immunology and Microbiology National Institutes of Health Bethesda MD 20892 USA
5. Department of Biological and Geographical Sciences University of Huddersfield School of Applied Sciences Queensgate Huddersfield HD1 3DH UK