1. Division of Theoretical Bioinformatics; German Cancer Research Center; Mathematikon - Berliner Str. 41 69120 Heidelberg Germany
2. BioQuant and IPMB; University of Heidelberg; Im Neuenheimer Feld 267 69120 Heidelberg Germany
3. Current address: COS; University of Heidelberg; Im Neuenheimer Feld 230 Germany
4. Mol. Hepatol., Department of Medicine II, Medical Faculty Mannheim; University of Heidelberg; 68167 Mannheim Germany
5. Max-Planck-Institute for Intelligent Systems; Heisenbergstr. 3 70569 Stuttgart Germany
6. Biophysical Chemistry; University of Heidelberg; Im Neuenheimer Feld 253 69120 Heidelberg Germany
7. Current address: BG Trauma Centre; University of Tübingen; Schnarrenbergstr. 95 72076 Tübingen Germany
8. Current address: Leibniz Institute of Plant Genetics and Crop Plant Research; Corrensstrasse 3 06466 Gatersleben Germany