About the Authors

Yingssu Tsai

Affiliation Molecular Biology Institute, University of California Los Angeles, Los Angeles, California, United States of America

Michael R Sawaya

Affiliations Molecular Biology Institute, University of California Los Angeles, Los Angeles, California, United States of America , Department of Chemistry and Biochemistry, University of California Los Angeles, Los Angeles, California, United States of America , University of California Los Angeles–United States Department of Energy Institute for Genomics and Proteomics, Los Angeles, California, United States of America

Gordon C Cannon

Affiliation Department of Chemistry and Biochemistry, University of Southern Mississippi, Hattiesburg, Mississippi, United States of America

Fei Cai

Affiliation Department of Chemistry and Biochemistry, University of Southern Mississippi, Hattiesburg, Mississippi, United States of America

Eric B Williams

Affiliation Department of Chemistry and Biochemistry, University of Southern Mississippi, Hattiesburg, Mississippi, United States of America

Sabine Heinhorst

Affiliation Department of Chemistry and Biochemistry, University of Southern Mississippi, Hattiesburg, Mississippi, United States of America

Cheryl A Kerfeld

Affiliations Molecular Biology Institute, University of California Los Angeles, Los Angeles, California, United States of America , University of California Los Angeles–United States Department of Energy Institute for Genomics and Proteomics, Los Angeles, California, United States of America , Life Sciences Core, University of California Los Angeles, Los Angeles, California, United States of America

Todd O Yeates

To whom correspondence should be addressed. E-mail: yeates@mbi.ucla.edu

Affiliations Molecular Biology Institute, University of California Los Angeles, Los Angeles, California, United States of America , Department of Chemistry and Biochemistry, University of California Los Angeles, Los Angeles, California, United States of America , University of California Los Angeles–United States Department of Energy Institute for Genomics and Proteomics, Los Angeles, California, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

YT, GCC, SH, CAK, and TOY conceived and designed the experiments. YT, MRS, FC, and EBW performed the experiments. YT, MRS, and TOY analyzed the data. GCC contributed reagents/materials/analysis tools. YT, CAK, and TOY wrote the paper.