1 Institute of Biochemistry and Molecular Biology, ZBMZ, Faculty of Medicine, University of Freiburg, Freiburg, Germany.
2 Institute of Biochemistry and Molecular Biology, ZBMZ, Faculty of Medicine, University of Freiburg, Freiburg, Germany. thomas.becker@biochemie.uni-freiburg.de.
3 CIBSS Centre for Integrative Biological Signalling Studies, University of Freiburg, Freiburg, Germany. thomas.becker@biochemie.uni-freiburg.de.