About the Authors

Michael J. Metzger

mm4184@columbia.edu

Affiliations Department of Biochemistry and Molecular Biophysics, Columbia University, New York, New York, United States of America, Howard Hughes Medical Institute, New York, New York, United States of America

Stephen P. Goff

Affiliations Department of Biochemistry and Molecular Biophysics, Columbia University, New York, New York, United States of America, Howard Hughes Medical Institute, New York, New York, United States of America, Department of Microbiology and Immunology, Columbia University, New York, New York, United States of America

Competing Interests

The authors have declared that no competing interests exist.