Roy J. Carver Department of Biochemistry, Biophysics and Molecular Biology, Iowa State University, Ames, Iowa, United States of America.|Department of Chemistry and Chemical Biology, Northeastern University, Boston, Massachusetts, United States of America.|Roy J. Carver Department of Biochemistry, Biophysics and Molecular Biology, Iowa State University, Ames, Iowa, United States of America.|Department of Biochemistry, University of Washington, Seattle, Washington, United States of America.|Department of Chemistry and Chemical Biology, Northeastern University, Boston, Massachusetts, United States of America.|Roy J. Carver Department of Biochemistry, Biophysics and Molecular Biology, Iowa State University, Ames, Iowa, United States of America.|Roy J. Carver Department of Biochemistry, Biophysics and Molecular Biology, Iowa State University, Ames, Iowa, United States of America.