1. Mass Spectrometry Research Center, Vanderbilt University, 465 21st Avenue South, 37240, Nashville, TN, USA
2. Department of Biochemistry, Vanderbilt University School of Medicine, 465 21st Avenue South, 37240, Nashville, TN, USA
3. Department of Chemistry, Vanderbilt University, 465 21st Avenue South, 37240, Nashville, TN, USA