1. Masonic Cancer Center, University of Minnesota, Minneapolis, Minnesota 55455, United States
2. Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, St. Paul, Minnesota 55108, United States
3. Center for Mass Spectrometry and Proteomics, University of Minnesota, St. Paul, Minnesota 55108, United States
4. Division of Environmental Health Sciences, School of Public Health, University of Minnesota, Minneapolis, Minnesota 55455, United States
5. Department of Veterinary Clinical Sciences, College of Veterinary Medicine, University of Minnesota, St. Paul, Minnesota 55108, United States
6. Department of Pharmacology, College of Medicine, University of Minnesota, Minneapolis, Minnesota 55455, United States
7. Department of Medicinal Chemistry, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota 55455, United States