1. Institut für Organische Chemie und Biochemie Technische Universität Darmstadt Darmstadt 64287 Germany
2. Prozomix Limited, West End Industrial Estate Haltwhistle Northumberland, NE49 9HA UK
3. KTH Royal Institute of Technology School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH) Department of Industrial Biotechnology AlbaNova University Center SE-106 91 Stockholm Sweden
4. Department of Chemistry Ångström Laboratory Uppsala University SE-751 20 Uppsala Sweden