1. Institute of Protein Biochemistry; Ulm University; Ulm Germany
2. Department of Physics, Chemistry and Biology; Division of Chemistry; Linköping University; Linköping Sweden
3. Institut de Biologie et Chimie des Protéines; Bases Moléculaires et Structurales des Systèmes Infectieux; Labex Ecofect; UMR 5086; CNRS; Université de Lyon; Lyon France
4. Sanders-Brown Center on Aging; University of Kentucky; Lexington KY USA
5. Department of Molecular and Cellular Biochemistry; University of Kentucky; Lexington KY USA