About the Authors

Joseph LeSauter

Affiliation Department of Psychology, Barnard College of Columbia University, New York, New York, United States of America

Christopher M. Lambert

Affiliation Department of Neurobiology, University of Massachusetts Medical School, Worcester, Massachusetts, United States of America

Margaret R. Robotham

Affiliation Department of Psychology, Barnard College of Columbia University, New York, New York, United States of America

Zina Model

Affiliation Department of Psychology, Barnard College of Columbia University, New York, New York, United States of America

Rae Silver

Affiliations Department of Psychology, Barnard College of Columbia University, New York, New York, United States of America, Department of Psychology, Columbia University, New York, New York, United States of America, Department of Pathology and Cell Biology, Columbia University Health Sciences, New York, New York, United States of America

David R. Weaver

David.weaver@umassmed.edu

Affiliation Department of Neurobiology, University of Massachusetts Medical School, Worcester, Massachusetts, United States of America

Competing Interests

The immunochemical characterization of the antibodies was performed in Rae Silver's lab, whose members (JL, MRR, ZM, RS) have no conflict of interest. C.M. Lambert has no conflict of interest. DRW declares the following conflict of interest: Antibodies R1177 (to PER1), R38 (to PER2), R41 (to CLOCK), and GP85 (to BMAL1) are commercially available from Millipore as product numbers AB2201-2204, respectively. D.R. Weaver and the University of Massachusetts Medical School receive royalty income from sale of these products. This does not alter our adherence to all the PLoS ONE policies on sharing data and materials. Requests for materials should be addressed to D.R. Weaver.

Author Contributions

Conceived and designed the experiments: JL RS DRW. Performed the experiments: JL CML MRR ZM DRW. Analyzed the data: JL MMR ZM RS. Contributed reagents/materials/analysis tools: CML. Wrote the paper: JL RS DRW. Point of contact for reagent requests: DRW.