About the Authors

Yun Liang

Affiliation Salk Institute for Biological Studies, Molecular and Cell Biology Laboratory, La Jolla, California, United States of America

Tobias M. Franks

Affiliation Salk Institute for Biological Studies, Molecular and Cell Biology Laboratory, La Jolla, California, United States of America

Maria C. Marchetto

Affiliation Salk Institute for Biological Studies, Laboratory of Genetics, La Jolla, California, United States of America

Fred H. Gage

Affiliation Salk Institute for Biological Studies, Laboratory of Genetics, La Jolla, California, United States of America

Martin W. Hetzer

Hetzer@salk.edu

Affiliation Salk Institute for Biological Studies, Molecular and Cell Biology Laboratory, La Jolla, California, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: YL MWH FHG. Performed the experiments: YL TMF MCM. Analyzed the data: YL TMF MCM. Contributed reagents/materials/analysis tools: MCM FHG. Wrote the paper: YL MWH.