title: Gas-Phase Hydrogen/Deuterium Exchange for Distinguishing Isomeric Carbohydrate Ions.
abstract: The structural diversity of carbohydrates presents a major challenge for glycobiology and the analysis of glycoconjugates. Mass spectrometry has become a primary tool for glycan analysis thanks to its speed and sensitivity, but the information content regarding the glycan structure of protonated glycoconjugates is hindered by the inability to differentiate linkage and stereoisomers. Here, we examine a variety of protonated carbohydrate structures by gas-phase hydrogen/deuterium exchange (HDX) to discover that the exchange rates are distinct for isomeric carbohydrates with even subtle structural differences. By incorporating an internal exchange standard, HDX could effectively distinguish all linkage and stereoisomers that were examined and presents a mass spectrometry-based approach for glycan structural analysis with immense potential.
authors.affiliation: Department of Medicinal Chemistry, University of Washington , Seattle, Washington 98195, United States.
authors.forename: Sanjit S
authors.initials: SS
authors.lastname: Uppal
authors.affiliation: Department of Medicinal Chemistry, University of Washington , Seattle, Washington 98195, United States.
authors.forename: Sarah E
authors.initials: SE
authors.lastname: Beasley
authors.affiliation: Department of Medicinal Chemistry, University of Washington , Seattle, Washington 98195, United States.
authors.forename: Michele
authors.initials: M
authors.lastname: Scian
authors.affiliation: Department of Medicinal Chemistry, University of Washington , Seattle, Washington 98195, United States.
authors.forename: Miklos
authors.identifier: 0000-0003-2419-1334
authors.initials: M
authors.lastname: Guttman