1. A. B. Hancock Jr. Memorial Laboratory
for Cancer Research, Departments of †Biochemistry, ‡Chemistry, and §Pharmacology, ∥Mass Spectrometry Research Center, ⊥Center in Molecular
Toxicology, and #Cell and Developmental Biology, Vanderbilt Institute
of Chemical Biology, and Vanderbilt-Ingram Cancer Center, Vanderbilt University School of Medicine, Nashville, Tennessee 37232-0146, United States