About the Authors

Ziyin Li

Affiliation Department of Pharmaceutical Chemistry, University of California San Francisco, San Francisco, California, United States of America

Takashi Umeyama

Affiliation Department of Pharmaceutical Chemistry, University of California San Francisco, San Francisco, California, United States of America

Ching C. Wang

ccwang@cgl.ucsf.edu

Affiliation Department of Pharmaceutical Chemistry, University of California San Francisco, San Francisco, California, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: ZL TU. Performed the experiments: ZL TU. Analyzed the data: ZL TU CCW. Wrote the paper: ZL CCW.