Resonant neutral-particle emission in collisions of electrons with peptide ions in a storage ring

被引：37
|
作者：
Tanabe, T [1 ]
Noda, K
Saito, M
Lee, S
Ito, Y
Takagi, H
机构：
[1] KEK, High Energy Accelerator Res Org, Tsukuba, Ibaraki 3050801, Japan
[2] Natl Inst Radiol Sci, Chiba 2638555, Japan
[3] Kyoto Prefectural Univ, Kyoto 6068522, Japan
[4] Kitasato Univ, Ctr Nat Sci, Sagamihara, Kanagawa 2288555, Japan
来源：
PHYSICAL REVIEW LETTERS | 2003年 / 90卷 / 19期
关键词：
D O I：
10.1103/PhysRevLett.90.193201
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
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.
引用
收藏
页码：1 / 193201
页数：4
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