About the Authors
- Kimberly J Reese, Shu Lin, Raluca I Verona, Marisa S Bartolomei
- Department of Cell and Developmental Biology, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, United States of America
- Richard M Schultz
- Department of Biology, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
The authors have declared that no competing interests exist.
KJR, RMS, and MSB conceived and designed the experiments. KJR, RIV, and SL performed the experiments. KJR analyzed the data with input from SL, RIV, RMS, and MSB. KJR wrote the paper with editing and other suggestions from RMS and MSB.