1. UCLA Molecular Biology Institute, 611 Charles E. Young Drive East, Los Angeles, California 90095-1570, United States
2. UCLA-DOE Institute for Genomics and Proteomics, 611 Charles E. Young Drive East, Los Angeles, California 90095-1570, United States
3. UCLA Department of Chemistry and Biochemistry, 611 Charles E. Young Drive East, Los Angeles, California 90095, United States