Acknowledgements
L. Blanchoin (CEA Grenoble, France) for helpful discussions. E. Hallberg (University College, Huddinge, Sweden) for transfection plasmid coding POM121-GFP. A. Hoppe (University of Michigan Medical School, Ann Arbor, USA) for the citrin-actin construct and helpful discussions. A. Noegel (Institute for Biochemistry, Medical Faculty, University of Cologne, Germany) for anti Nuance mAb and H. Hermann (DKFZ, Heidelberg, Germany) for anti-Emerin mAb. TD Allen (Paterson Institute for Cancer Research, Manchester, UK), G. Danuser (Scripps Research Institute, USA) and JC Courvalin (Institut Jacques Monod, Paris, France) for helpful discussion. F. Frischknecht for critical reading of the manuscript. SM is recipient of a DAAD (Doktorandenstipendium im Rahmen des gemeinsamen Hochschulprogrammes III von Bund und Ländern) and FRM grant. JE is supported by FRM and EMBO. Special thanks to Mathieu Marchand, Emmanuelle Perret, and Pascal Roux for excellent technical support. PFID is supported by Institut Pasteur, Fondation pour la Recherche Medicale, La ministre deleguee a la recherche et aux nouvelles technologies, La Région Ile-de-France (programme SESAME), and the European Union (EAMNET-FP5; AUTOMATION NEST-FP6).