About the Authors

Annie Albin Lumen

Current address: National Center for Toxicological Research/Food and Drug Administration, Jefferson, Arkansas, United States of America

AAL and LL are joint first authors on this work.

Affiliations Department of Biology, Drexel University, Philadelphia, Pennsylvania, United States of America, Preclinical Drug Metabolism and Pharmacokinetics, GlaxoSmithKline, King of Prussia, Pennsylvania, United States of America

Libin Li

AAL and LL are joint first authors on this work.

Affiliation Absorption Systems LLC, Exton, Pennsylvania, United States of America

Jiben Li

Affiliation Absorption Systems LLC, Exton, Pennsylvania, United States of America

Zeba Ahmed

Affiliations Department of Biology, Drexel University, Philadelphia, Pennsylvania, United States of America, Preclinical Drug Metabolism and Pharmacokinetics, GlaxoSmithKline, King of Prussia, Pennsylvania, United States of America

Zhou Meng

Affiliations Department of Biology, Drexel University, Philadelphia, Pennsylvania, United States of America, Preclinical Drug Metabolism and Pharmacokinetics, GlaxoSmithKline, King of Prussia, Pennsylvania, United States of America

Albert Owen

Affiliation Absorption Systems LLC, Exton, Pennsylvania, United States of America

Harma Ellens

Harma.M.Ellens@gsk.com (HE); ihidalgo@absorption.com (IH); bentzj@drexel.edu (JB)

Affiliation Preclinical Drug Metabolism and Pharmacokinetics, GlaxoSmithKline, King of Prussia, Pennsylvania, United States of America

Ismael J. Hidalgo

Harma.M.Ellens@gsk.com (HE); ihidalgo@absorption.com (IH); bentzj@drexel.edu (JB)

Affiliation Absorption Systems LLC, Exton, Pennsylvania, United States of America

Joe Bentz

Harma.M.Ellens@gsk.com (HE); ihidalgo@absorption.com (IH); bentzj@drexel.edu (JB)

Affiliation Department of Biology, Drexel University, Philadelphia, Pennsylvania, United States of America

Competing Interests

The authors have declared the following interests: Reagents were provided by GSK and by Absorption Systems, who also supported the execution of the experiments. AAL, ZA, ZM and HE are employed by GlaxoSmithKline and LL, JL, AO, and IJH by Absorption Systems LLC. Amprenavir and GF120918 were from GlaxoSmithKline. There are no further patents, products in development or marketed products to declare. This does not alter the authors' adherence to all the PLOS ONE policies on sharing data and materials, as detailed online in the guide for authors.

Author Contributions

Conceived and designed the experiments: AAL HE AO IH JB. Performed the experiments: AAL JL LL ZA ZM. Analyzed the data: AAL HE JB. Contributed reagents/materials/analysis tools: JB. Wrote the paper: AAL LL AO HE IH JB.