@article{oai:repo.qst.go.jp:00045024,
 author = {Tanabe, Tetsumi and Starikov, Evgeni and Noda, Kouji and 田邊 徹美 and 野田 耕司},
 journal = {Chemical Physics Letters},
 month = {Nov},
 note = {Electron-ion collisions have been studied for various protonated and alkali-metal adducted peptide monocations, using an electrostatic storage ring. Neutral particle production rates vs. collision energy show typical electron-capture-dissociation profiles for all of the protonated peptides and some of alkali-metal adducted peptides, which consist of a rise towards zero-energy and a bump at high energies. The rate is often enhanced by adducting lithium or sodium cation to peptides compared to the protonated ones. For the alkali-metal adducted cations, the rate correlates with the strength of the non-covalent p–cation interaction. Molecular mechanics and quantum-chemical computations performed here help explain these results.},
 pages = {202--207},
 title = {Mechanism of protonation of oligopeptides and their interaction with alkali cations},
 volume = {449},
 year = {2007}
}