1. Department of Chemistry, University of Nebraska—Lincoln, Lincoln, Nebraska 68588, United States
2. Department of Biochemistry, University of Nebraska—Lincoln, Lincoln, Nebraska 68588, United States
3. Division of Gastroenterology-Hepatology, University of Nebraska Medical Center, Omaha, Nebraska 68198, United States
4. Research Service, Veterans’ Affairs, Nebraska-Western Iowa Health Care System, Omaha, Nebraska 68105, United States
5. Nebraska Center for Integrated Biomolecular Communication, University of Nebraska—Lincoln, Lincoln, Nebraska 68588, United States
6. Cancer Genes and Molecular Regulation Program, Fred & Pamela Buffet Cancer Center, University of Nebraska Medical Center, Omaha, Nebraska 68198, United States
7. Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States