About the Authors

Sean M. Bell

sbell@bmrn.com

Affiliation BioMarin Pharmaceutical, Novato, California, United States of America

Dan J. Wendt

Affiliation BioMarin Pharmaceutical, Novato, California, United States of America

Yanhong Zhang

Affiliation BioMarin Pharmaceutical, Novato, California, United States of America

Timothy W. Taylor

† Deceased.

Affiliation BioMarin Pharmaceutical, Novato, California, United States of America

Shinong Long

Affiliation BioMarin Pharmaceutical, Novato, California, United States of America

Laurie Tsuruda

Affiliation BioMarin Pharmaceutical, Novato, California, United States of America

Bin Zhao

Current address: BioZ Consulting, San Ramon, California, United States of America

Affiliation BioMarin Pharmaceutical, Novato, California, United States of America

Phillip Laipis

Affiliation Department of Biochemistry and Molecular Biology, University of Florida, Gainesville, Florida, United States of America

Paul A. Fitzpatrick

Affiliation BioMarin Pharmaceutical, Novato, California, United States of America

Competing Interests

All authors except Dr. Laipis are employees of BioMarin Pharmaceutical Inc. BioMarin has funded all the studies and is developing rAvPAL-PEG for treatment of Phenylketonuria. The described study was a part of the drug development program at BioMarin. Patents regarding this approach and drug formulation have been filed. This does not alter the authors' adherence to PLoS ONE policies on sharing data and materials. The internal publication review committee approved the manuscript for publication.

Author Contributions

Conceptualization: PAF SMB DJW. Data curation: SMB LT PL PAF. Formal analysis: SMB BZ PL. Investigation: SMB DJW YZ SL LT BZ PL PAF. Methodology: SMB DJW BZ PAF PL. Project administration: PAF. Resources: SMB YZ TWT PL PAF. Supervision: PAF. Validation: PAF SMB LT PL. Visualization: SMB. Writing – original draft: SMB. Writing – review & editing: SMB PAF.