Hua Tang1, Gregory S Barsh2. 1. Department of Genetics, Stanford University, 300 Pasteur Drive, Stanford, CA 94305, USA. gbarsh@hudsonalpha.org huatang@stanford.edu. 2. HudsonAlpha Institute for Biotechnology, 601 Genome Way, Huntsville, AL 35806, USA. gbarsh@hudsonalpha.org huatang@stanford.edu.