1. Department of Chemistry University College London 20 Gordon Street London WC1H 0AJ UK
2. Department of Biochemical Engineering University College London Bernard Katz Building London WC1E 6BT UK
3. Institute of Pharmaceutical Sciences University of Freiburg Albertstr. 25 79104 Freiburg Germany
4. Fraunhofer Institute for Interfacial Engineering and Biotechnology (IGB) Branch Biocat Schulgasse 11a 94315 Straubing Germany