| Affiliation: | (1) Department of Physiology II, University of Heidelberg, Heidelberg, Germany;(2) Department of Developmental Biology, Beckmann Center for Molecular and Genetic Medicine, Stanford University School of Medicine, Stanford, California;(3) Howard Hughes Medical Institute, Chevy Chase, Maryland;(4) Institute for Cell Biology, Swiss Federal Institute of Technology, ETH-Hönggerberg, CH-8093 Zu;aurich, Switzerland;(5) Present address: Department of Physiology, University of Köln, Robert-Kochstr. 39, 50931 Köln, Germany |
