About the Authors

Jess H Leber

Affiliation Department of Biochemistry and Biophysics, University of California, San Francisco, California, United States of America

Sebastián Bernales

Affiliation Department of Biochemistry and Biophysics, University of California, San Francisco, California, United States of America

Peter Walter

To whom correspondence should be addressed. E-mail: walter@cgl.ucsf.edu

Affiliations Department of Biochemistry and Biophysics, University of California, San Francisco, California, United States of America, Howard Hughes Medical Institute, Chevy Chase, Maryland, United States of America

Competing Interests

The authors have declared that no conflicts of interest exist.

Author Contributions

JHL and PW conceived and designed the experiments. JHL and SB performed the experiments. JHL and PW analyzed the data and wrote the paper.