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