Affiliation: | 1. Sangamo BioSciences, Inc., Point Richmond Tech Center, Richmond, California 94804, USA;;2. The Whitehead Institute for Biomedical Research, Cambridge, Massachusetts 02142, USA;;3. Department of Cellular and Molecular Pharmacology, University of California, San Francisco, California 94158, USA;;4. Sigma-Aldrich Research Biotechnology, St. Louis, Missouri 63103, USA;;5. Department of Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA |