About the Authors
Department of Integrative Biology, University of California Berkeley, Berkeley, California, United States of America
Department of Genetics, Harvard Medical School, Boston, Massachusetts, United States of America
Division of Genetics, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
Laboratory of Chromosome Engineering, Institute of Molecular and Cellular Biology, Novosibirsk, Russia
The authors have declared that no competing interests exist.
The author(s) have made the following declarations about their contributions: Conceived and designed the experiments: DB QZ CEE. Performed the experiments: QZ CEE VBK AAA AAG. Analyzed the data: QZ CEE VBK. Contributed reagents/materials/analysis tools: DB. Wrote the paper: DB.