1. Physikalische Biochemie Universität Potsdam Karl-Liebknecht-Str. 24–25 14476 Potsdam Germany
2. Theory and Biosystems Max Planck Institute of Colloids and Interfaces Am Mühlenberg 1 14476 Potsdam Germany
3. Current address: Department of Biotechnology and Biomedicine Technical University of Denmark Søltofts Plads 2800 Kgs. Lyngby Denmark
4. Department of Organic Chemistry Arrhenius Laboratory Stockholm University 10691 Stockholm Sweden