1. Laboratory for Organic Synthesis of Functional Systems, Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Str. 2, D-12489 Berlin, Germany
2. Division 1.5 Protein Analysis, Federal Institute for Materials Research and Testing (BAM), D-12489 Berlin, Germany
3. Functional Materials, Department of Chemistry, Technische Universität Berlin, D-10623 Berlin Germany
4. Surface Modification and Measurement Technology Division, Federal Institute for Materials Research and Testing (BAM), D-12205 Berlin, Germany
5. Medical Bioinformatics Division, Department of Mathematics, Freie Universität Berlin, D-14195 Berlin, Germany