*
Corresponding authors
a
Department of Biosystems Science and Engineering, ETH Zurich, Mattenstrasse 26, 4058 Basel, Switzerland
b
Faculty of Physics, University of Freiburg, Hermann-Herder-Str. 3, 79104 Freiburg, Germany
c
BIOSS Centre for Biological Signalling Studies, University of Freiburg, Hebelstrasse 25, 79104 Freiburg, Germany
d
Faculty of Biology, University of Freiburg, Schänzlestrasse 1, 79104 Freiburg, Germany
E-mail:
wilfried.weber@biologie.uni-freiburg.de
Fax: +49 761 203 97660
Tel: +49 761 203 97654
e
Spemann Graduate School of Biology and Medicine SGBM, University of Freiburg, Albertstrasse 19a, 79104 Freiburg, Germany
f
ZBSA Center for Biological Systems Analysis, University of Freiburg, Habsburgerstr. 49, 79104 Freiburg, Germany
g
FRIAS Freiburg Institute for Advanced Studies, University of Freiburg, Albertstrasse 19, 79104 Freiburg, Germany