1. Institute of Biochemistry I, Jena University Hospital 1 , Jena, Germany
2. —Friedrich Schiller University Jena 1 , Jena, Germany
3. Leibniz Institute on Aging—Fritz Lipmann Institute 2 , Jena, Germany
4. Electron Microscopy Center, Jena University Hospital 3 — , Jena, Germany
5. Friedrich Schiller University Jena 3 — , Jena, Germany