Affiliation: | 1. Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, TX, USA;2. Department of Cellular and Molecular Pharmacology, University of California, San Francisco, San Francisco, CA, USA;3. Department of Microbiology and Immunology, University of California, San Francisco, San Francisco, CA, USA;4. Howard Hughes Medical Institute, University of California, San Francisco, San Francisco, CA, USA |