About the Authors

Bruce P May

Contributed equally to this work with: Bruce P May, Zachary B Lippman

Current address: NTL Ltd, Ho Chi Minh City, Vietnam

Zachary B Lippman

Contributed equally to this work with: Bruce P May, Zachary B Lippman

Current address: Faculty of Agriculture, Institute of Plant Sciences, Hebrew University of Jerusalem, Rehovot, Israel

Yuda Fang

Affiliation Cold Spring Harbor Laboratory, Cold Spring Harbor, New York, United States of America

David L Spector
Robert A Martienssen

To whom correspondence should be addressed. E-mail: martiens@cshl.edu

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

BPM, ZBL, and RAM conceived and designed the experiments. BPM, ZBL, and YF performed the experiments. BPM, ZBL, YF, DLS, and RAM analyzed the data. BPM and ZBL contributed reagents/materials/analysis tools. BPM, ZBL, and RAM wrote the paper.