1Dartmouth Medical School Department of Genetics, Hanover, New Hampshire 03755, USA. [email protected] 2Department of Biochemistry and Cell Biology, Rice University, Houston, Texas 77005 USA
3Whitehead Institute for Biomedical Research, Massachusetts Institute of Technology, Department of Biology, Cambridge, Massachusetts 02139, USA
4Massachusetts Institute of Technology, Department of Biology, Cambridge, Massachusetts 02142, USA
5Center for Gene Research and Biotechnology, and Department of Botany and Plant Pathology, Oregon State University, Corvallis, Oregon 97331, USA
6Waksman Institute, Rutgers University, Piscataway, New Jersey 08854, USA
7Howard Hughes Medical Institute and Department of Biochemistry & Biophysics, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania 19104-6148, USA
8Howard Hughes Medical Institute, Washington University Department of Genetics, Saint Louis, Missouri 63110, USA
9Cambridge Center, Cambridge, MA 02142, USA;
10, The Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton, Cambridge, CB10 1SA, UK,
11Institute of Molecular Biology, Austrian Academy of Sciences, A-5020 Salzburg, Austria
12Department of Genetics, Harvard Medical School, and Department of Molecular Biology, Massachusetts General Hospital, Boston, Massachusetts 02114, USA.
13Research Group of Combinatorical Biochemistry, MPI for biophysical chemistry, Max Planck Society
