1. Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
2. Resource for Native MS Guided Structural Biology, The Ohio State University, Columbus, Ohio 43210, United States
3. Bruker Daltonics Inc., Billerica, Massachusetts 01821, United States
4. Campus Chemical Instrument Center, Mass Spectrometry and Proteomics, The Ohio State University, Columbus, Ohio 43210, United States