1. Department of Pharmaceutical Sciences, University of California, Irvine, Irvine, California 92697-3958, United States
2. Department of Chemistry, University of California, Irvine, Irvine, California 92697-3958, United States
3. Department of Molecular Biology and Biochemistry, University of California, Irvine, Irvine, California 92697-3958, United States
4. Department of Chemical and Biomolecular Engineering, University of California, Irvine, Irvine, California 92697-3958, United States