1. Matthias Schleiden Institute of Genetics Bioinformatics and Molecular Botany Friedrich Schiller University Jena Jena 07743 Germany
2. Physical and Biophysical Chemistry Department of Chemistry Bielefeld University Bielefeld 33615 Germany
3. Electron Microscopy Center Jena University Hospital Jena 07743 Germany
4. Medical School OWL Bielefeld University Bielefeld 33615 Germany