title: Resonant neutral-particle emission in collisions of electrons with peptide ions in a storage ring.
abstract: Electron-biomolecular ion collisions were studied using an electrostatic storage ring with a merging beam technique for singly protonated peptides (angiotensin I, II, and III). A strong neutral-particle emission at around 6.5 eV was found in addition to neutrals from recombination at low energies. The rates of the high-energy peak greatly decreased with a slight decrease in the number of amino-acid residues from angiotensin I to III. These results suggest that some peptide bonds were selectively cleaved.
authors.affiliation: High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Tanabe
authors.forename: K
authors.initials: K
authors.lastname: Noda
authors.forename: M
authors.initials: M
authors.lastname: Saito
authors.forename: S
authors.initials: S
authors.lastname: Lee
authors.forename: Y
authors.initials: Y
authors.lastname: Ito
authors.forename: H
authors.initials: H
authors.lastname: Takagi
mesh_terms: D000809:Angiotensins / Q000737:chemistry*; D004583:Electrons; D007477:Ions; D055672:Static Electricity
chemical_list: D000809:Angiotensins; D007477:Ions