1. Department of Biochemistry and Molecular Biology, University of Southern Denmark; Odense Denmark
2. School of Biotechnology, AlbaNova University Center, Royal Institute of Technology (KTH); Stockholm Sweden
3. Max Planck Institute of Molecular Cell Biology and Genetics; Dresden Germany
4. Department of Cell Biology, Max Planck Institute of Biochemistry; Martinsried Germany
5. Biozentrum, University of Basel; Basel Switzerland