1. Department of Chemistry, University of Southern California, Los Angeles, California
90089-0744, United States
2. Department of Biochemistry, University of Southern California, Los Angeles, California 90033-1039, United States
3. Department of Biological Sciences, University of Southern California, Los Angeles, California
90089-0744, United States
4. Department of Pharmacology and Pharmaceutical Sciences, University of Southern California, Los Angeles, California
90089-9121, United States