1. Institute for Physiological Chemistry, University of Tübingen, 72076 Tübingen, Germany
2. Wilhelm-Schickard Institute for Informatics, University of Tübingen, 72076 Tübingen, Germany
3. Institute of Molecular Biology, Biochemistry, and Microbiology, Karl-Franzens University, 8010 Graz, Austria
4. Department of Plant Biology, Carnegie Institution of Washington, Stanford University, Stanford, CA 94305
5. European Neuroscience Institute Göttingen, 37073 Göttingen, Germany