1. Technical and Macromolecular Chemistry Paderborn University Warburger Str. 100 33098 Paderborn Germany
2. Dipartimento di Fisica Università di Bari, and Sezione INFN di Bari via Amendola 173 70126 Bari Italy
3. Institute for Computational Molecular Science and Department of Biology Temple University Philadelphia PA 19122 USA
4. B CUBE - Center for Molecular Bioengineering Technische Universität Dresden Tatzberg 41 01307 Dresden Germany