Aarhus University Seal / Aarhus Universitets segl

Frank Jensen

Dissociative capture of hot (3-13 eV) electrons by polypeptide polycations: An efficient process accompanied by secondary fragmentation

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

  • Frank Kjeldsen, University of Southern Denmark
  • ,
  • Kim F. Haselmann, University of Southern Denmark
  • ,
  • Bogdan A. Budnik, University of Southern Denmark
  • ,
  • F. Jensen
  • Roman A. Zubarev, University of Southern Denmark
Beside the known maximum of electron capture dissociation (ECD) of gas-phase polypeptide polycations at zero electron energy, a broad local maximum is found around 10 eV. This maximum is due to electronic excitation prior to electron capture, as in dissociative recombination of small cations. In the novel hot electron capture dissociation (HECD) regime, not only N-C bonds are cleaved as in ECD, but secondary fragmentation is also induced due to the excess energy. Beneficially, this fragmentation includes abundant losses of ·CH(CH) from leucine and ·CHCH from isoleucine residues terminal to the cleavage site, which allows for distinguishing between these two isomeric residues.
Original languageEnglish
JournalChemical Physics Letters
Volume356
Issue3-4
Pages (from-to)201-206
Number of pages6
ISSN0009-2614
DOIs
Publication statusPublished - 2002
Externally publishedYes

See relations at Aarhus University Citationformats

ID: 55281706