1. Department
of Chemistry, University of Massachusetts-Amherst, Amherst, Massachusetts 01003, United States
2. Department
of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
3. Department
of Cell and Regenerative Biology, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
4. Human
Proteomics Program, University of Wisconsin-Madison, Madison, Wisconsin 53705, United States
5. Department
of Biochemistry and Molecular Biology, University of Massachusetts-Amherst, Amherst, Massachusetts 01003, United States