4Department of Microbiology, Immunology, and Molecular Genetics, University of California, Los Angeles, Los Angeles, California 90095, USA
6Department of Molecular and Medical Pharmacology, University of California, Los Angeles, California 90095, USA
7Jonsson Comprehensive Cancer Center, University of California, Los Angeles, California 90095, USA
8Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, University of California, Los Angeles, California 90095, USA.
9Molecular Biology Institute, University of California, Los Angeles, California 90095, USA
