1. Institute of Nano- and Biotechnologies (INB) FH Aachen 52428 Jülich Germany
2. Institute of Pharmaceutical Chemistry Philipps University Marburg 35032 Marburg Germany
3. FH Aachen Institut fur Nano- und Biotechnologien
4. Institute of Biological Information Processing (IBI-3) Forschungszentrum Jülich GmbH 52425 Jülich Germany