1. Department
of Chemistry; §School of Engineering; #Canary Center at Stanford for Cancer Early
Detection, Stanford University School of Medicine; ∇Howard Hughes Medical Institute, Stanford University, Stanford, California 94305, United States
2. School of Computing, University of Utah, Salt Lake City, Utah 84112, United States
3. Complex Carbohydrate
Research Center, University of Georgia, Athens, Georgia 30602, United States
4. QB3Mass Spectrometry, University of California, Berkeley, California 94720, United States