About the Authors

Jennifer S. Dickey

Contributed equally to this work with: Jennifer S. Dickey, Yanira Gonzalez

Current address: Office of In Vitro Diagnostics, Center for Devices and Radiological Health, Food and Drug Administration, Silver Spring, Maryland, United States of America

Affiliation Division of Therapeutic Proteins, Center for Drug Evaluation and Research, Food and Drug Administration, Bethesda, Maryland, United States of America

Yanira Gonzalez

Contributed equally to this work with: Jennifer S. Dickey, Yanira Gonzalez

Affiliation Division of Therapeutic Proteins, Center for Drug Evaluation and Research, Food and Drug Administration, Bethesda, Maryland, United States of America

Baikuntha Aryal

Affiliation Division of Therapeutic Proteins, Center for Drug Evaluation and Research, Food and Drug Administration, Bethesda, Maryland, United States of America

Steven Mog

Affiliation Center for Food Safety and Applied Nutrition, Food and Drug Administration, College Park, Maryland, United States of America

Asako J. Nakamura

Current address: Department of Biological Sciences, Ibaraki University, Ibaraki, Japan

Affiliation Laboratory of Molecular Pharmacology, National Cancer Institute, Bethesda, Maryland, United States of America

Christophe E. Redon

Affiliation Laboratory of Molecular Pharmacology, National Cancer Institute, Bethesda, Maryland, United States of America

Ulrich Baxa

Affiliation Electron Microscopy Laboratory, Advanced Technology Program, Frederick National Laboratory for Cancer Research, Frederick, Maryland, United States of America

Elliot Rosen

Affiliation Division of Therapeutic Proteins, Center for Drug Evaluation and Research, Food and Drug Administration, Bethesda, Maryland, United States of America

Gang Cheng

Affiliation Department of Biophysics and Free Radical Research Center, Medical College of Wisconsin, Milwaukee, Wisconsin, United States of America

Jacek Zielonka

Affiliation Department of Biophysics and Free Radical Research Center, Medical College of Wisconsin, Milwaukee, Wisconsin, United States of America

Palak Parekh

Affiliation Laboratory of Molecular Pharmacology, National Cancer Institute, Bethesda, Maryland, United States of America

Karen P. Mason

Affiliation Division of Therapeutic Proteins, Center for Drug Evaluation and Research, Food and Drug Administration, Bethesda, Maryland, United States of America

Joy Joseph

Affiliation Department of Biophysics and Free Radical Research Center, Medical College of Wisconsin, Milwaukee, Wisconsin, United States of America

Balaraman Kalyanaraman

Affiliation Department of Biophysics and Free Radical Research Center, Medical College of Wisconsin, Milwaukee, Wisconsin, United States of America

William Bonner

Affiliation Laboratory of Molecular Pharmacology, National Cancer Institute, Bethesda, Maryland, United States of America

Eugene Herman

Affiliation Division of Drug Safety Research, Center for Drug Evaluation and Research, Food and Drug Administration, Silver Spring, Maryland, United States of America

Emily Shacter

Affiliation Division of Therapeutic Proteins, Center for Drug Evaluation and Research, Food and Drug Administration, Bethesda, Maryland, United States of America

V. Ashutosh Rao

ashutosh.rao@fda.hhs.gov

Affiliation Division of Therapeutic Proteins, Center for Drug Evaluation and Research, Food and Drug Administration, Bethesda, Maryland, United States of America

Competing Interests

Eisai Co., Ltd. donated the SST-2 cells used in this study. The authors have no patents, products in development, marketed products or competing interests to declare. This does not alter the authors' adherence to all the PLOS ONE policies on sharing data and materials. The views expressed in this article are those of the authors and do not necessarily reflect the official policy or position of the United States Food and Drug Administration and the Department of Health and Human Services, nor does mention of trade names, commercial products, or organizations imply endorsement by the United States Government.

Author Contributions

Conceived and designed the experiments: VAR ES EH WB BK JSD. Performed the experiments: JSD YG BA SM AN CR UB ER GC JZ PP KM JJ BK EH VAR. Analyzed the data: VAR ES EH WB BK JSD. Contributed reagents/materials/analysis tools: JJ BK. Wrote the paper: VAR JSD BA SM.