1. Cold Spring Harbor Laboratory , 1 Bungtown Road, Cold Spring Harbor, NY 11724 , USA
2. Department of Biology, University of Pennsylvania , 415 S. University Ave, Philadelphia, PA 19104 , USA
3. Center for Plant Molecular Biology, University of Tübingen , Auf der Morgenstelle 32, 72076 Tübingen , Germany
4. Department of Biophysics and Biophysical Chemistry, Johns Hopkins School of Medicine , Baltimore, MD 21205 , USA
5. Molecular, Cellular, and Developmental Biology (MCDB), The Ohio State University , Columbus, OH 43215 , USA
6. Department of Molecular Genetics, The Ohio State University , Columbus, OH 43215 , USA
7. Department of Biophysics and Biophysical Chemistry, Johns Hopkins School of Medicine, Howard Hughes Medical Institute , Baltimore, MD 21205 , USA