Affiliation: | 1. Department of Biological Sciences, University of Pittsburgh, Pennsylvania 15261, USA.;2. Department of Pathology, University of Utah Medical School, Salt Lake City, Utah 84132, USA.;3. Laboratoire de Microscopie Electronique, Institut de Biologie Structurale J.-P. Ebel, UMR 5075 CEA-CNRS-UJF, 38027 Grenoble, France. |