1. Basic
Research Laboratory, Center for Cancer Research, National Cancer Institute, Frederick, Maryland 21702, United States
2. Basic
Science Program, Leidos Biomedical Research, Inc., NCI Center for Cancer Research, Frederick National Laboratory for Cancer Research, Frederick, Maryland 21702, United States
3. National
Center for Macromolecular Imaging, Verna and Marrs McLean Department
of Biochemistry and Molecular Biology, Baylor College of Medicine, Houston, Texas 77030, United States
4. HIV
Drug Resistance Program, National Cancer Institute, Frederick, Maryland 21702, United States
5. Food
and Drug Administration, Center for Biologics Evaluation and Research,
Office of Cellular, Tissue and Gene Therapies, Silver Spring, Maryland 20993, United States
6. Department
of Chemistry, Seattle Pacific University, Seattle, Washington 98119, United States
7. Department
of Chemistry and Biochemistry, Biomolecular Science and Engineering
Program, University of California, Santa Barbara, California 93106-9510, United States