1. Department of Chemistry, University of Wisconsin, Madison, WI, USA.
2. Departments of Chemistry and Chemical Biology and Pharmaceutical Sciences, Northeastern University, Boston, MA, USA.
3. Department of Structural Biology and Chemistry, Institut Pasteur, CNRS, Paris, France.
4. Consortium for Top-Down Proteomics, Cambridge, MA, USA.
5. Department of Cell and Regenerative Biology, Department of Chemistry, Human Proteomics Program, University of Wisconsin-Madison, Madison, WI, USA.
6. Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA, USA.
7. Pacific Northwest National Laboratory, Richland, WA, USA.
8. Spectroswiss, Lausanne, Switzerland.
9. Departments of Chemistry, Molecular Biosciences and the Feinberg School of Medicine, Northwestern University, Evanston, IL, USA.