Affiliation: | 1.Berlin Institute for Medical Systems Biology, Max Delbrück Center for Molecular Medicine, Robert-Rössle-Strasse 10, 13125 Berlin, Germany;2.Laboratory of Signal Transduction, National Institute of Environmental Health Sciences, Research Triangle Park, NC 27709 USA;3.Howard Hughes Medical Institute and Laboratory for RNA Molecular Biology, The Rockefeller University, New York, NY 10065 USA |