title: Decomposition of protonated threonine, its stereoisomers, and its homologues in the gas phase: evidence for internal backside displacement.
abstract: Protonated threonine and its allo diastereomer exhibit different proportions of collisionally activated dissociation (CAD) product ions. N-Methylation attenuates these differences. Water loss from protonated allo-threonine gives protonated trans-3-methylaziridinecarboxylic acid via an internal S(N)2 pathway, rather than protonated vinylglycine.
authors.affiliation: Department of Chemistry, University of California-Riverside, Riverside, California 92521-0403, USA.
authors.forename: Scott V
authors.initials: SV
authors.lastname: Serafin
authors.forename: Kangling
authors.initials: K
authors.lastname: Zhang
authors.forename: Luigi
authors.initials: L
authors.lastname: Aurelio
authors.forename: Andrew B
authors.initials: AB
authors.lastname: Hughes
authors.forename: Thomas Hellman
authors.initials: TH
authors.lastname: Morton