1. Department of Biological Chemistry, David Geffen School of Medicine at UCLA, Los Angeles, California 90095, USA
2. Department of Molecular Cellular Developmental Biology, David Geffen School of Medicine at UCLA, Los Angeles, California 90095, USA
3. Senior Scientist of Protein Science, Abraxis BioScience (Note: Abraxis BioScience and its subsidiaries have become a wholly-owned subsidiary of Celgene Corporation)
4. California NanoSystems Institute at UCLA, Los Angeles, California 90095, USA