1. Workgroup Structural Biology of Biosynthetic Enzymes, Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre for Infection Research (HZI), Saarland University, Campus Geb. E8.1, 66123 Saarbrücken, Germany
2. Department of Biochemistry, Saarland University, Campus Geb. B2.2, 66123 Saarbrücken, Germany
3. Research Group Drug Bioinformatics, HIPS, HZI, 66123 Saarbrücken, Germany
4. Faculty of Medicine, Saarland University, 66424 Homburg, Germany
5. School of Chemistry, University of Glasgow, Glasgow G12 8QQ, U.K.