Resonant neutral-particle emission in collisions of electrons with peptide ions in a storage ring.
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.
Tanabe
T
T
High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801, Japan.
Noda
K
K
Saito
M
M
Lee
S
S
Ito
Y
Y
Takagi
H
H
D000809:Angiotensins / Q000737:chemistry*; D004583:Electrons; D007477:Ions; D055672:Static Electricity
D000809:Angiotensins; D007477:Ions