Affiliation: | 1 Department of Physics and Astronomy, Iowa State University, Ames, IA 50011, USA 2 Department of Biochemistry, Biophysics and Molecular Biology, Iowa State University, Ames, IA 50011, USA 3 Molecular, Cellular and Developmental Biology Interdepartmental Graduate Program, Iowa State University, IA 50011, USA 4 Department of Anatomy, School of Medicine, University of California, San Francisco, CA 94143, USA |