1. Cell death signalling group, Institute of Biochemistry II, Goethe University Medical School, Frankfurt 60590, Germany.
2. Institute for Immunology, University Medical Center of the Johannes Gutenberg-University Mainz, Langenbeckstraße 1, Building 708, Mainz 55131, Germany.
3. Stark Learning Center, Department of Biology and Health Sciences, Wilkes University, Wilkes-Barre, Pennsylvania, PA 18766, USA.
4. Department of Protein Engineering, Genentech Inc., 1 DNA Way, South San Francisco, CA 94080, USA.
5. Department of Molecular Biology, Genentech Inc., South San Francisco, CA 94080, USA.
6. Institute of Biochemistry, Medical Faculty, University of Giessen, Giessen 35392, Germany.