Institution: | 1 Department of Chemistry, University of Washington, Seattle, WA 98195, USA 2 Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, 240 Longwood Avenue, Boston, MA 02115, USA 3 Department of Molecular Biology and Microbiology, Tufts University School of Medicine, Boston, MA 02111, USA 4 Department of Biochemistry, University of Washington, Seattle, WA 98195, USA |