1. Mass Spectrometry Research Center, Vanderbilt University, Nashville, Tennessee 37232, United States
2. Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37232, United States
3. Department of Biochemistry, Vanderbilt University, Nashville, Tennessee 37232, United States
4. Delft Center for Systems and Control, Delft University of Technology, 2628 Delft, The Netherlands
5. Department of Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee 37232, United States