Affiliation: | From the ‡Institute of Cell Biology and Immunology, University of Stuttgart, Allmandring 31, 70569 Stuttgart, Germany and ;the §Institute of Computational Biology, Helmholtz Zentrum München, Ingolstädter Landstrasse 1, 85764 Neuherberg, Germany and ;the ¶Department of Mathematics, Technische Universität München, Boltzmannstrasse 3, 85748 Garching, Germany |