Publication type: Article in scientific journal
Type of review: Peer review (publication)
Title: Dissociative recombination cross section and branching ratios of protonated dimethyl disulfide and N-methylacetamide
Authors: Al-Khalili, A.
Thomas, R.
Ehlerding, A.
Hellberg, F.
Geppert, W. D.
Zhaunerchyk, V.
Ugglas, M. af
Larsson, M.
Uggerud, E.
Vedde, J.
Adlhart, Christian
Semaniak, J.
Kamińska, M.
Zubarev, R. A.
Kjeldsen, F.
Andersson, P. U.
Österdahl, F.
Bednarska, V. A.
Paál, A.
DOI: 10.1063/1.1782772
Published in: The Journal of Chemical Physics
Volume(Issue): 121
Issue: 12
Pages: 5700
Pages to: 5708
Issue Date: 2004
Publisher / Ed. Institution: American Institute of Physics
Publisher / Ed. Institution: College Park, Maryland, USA
ISSN: 0021-9606
Language: English
Subjects: Biomolecules; Electron capture; Collisions; Proteins; Dissociation; Molecular dissociation; Peptides
Subject (DDC): 540: Chemistry
Abstract: Di-Me disulfide (DMDS) and N-methylacetamide are two first choice model systems that represent the disulfide bridge bonding and the peptide bonding in proteins. These molecules are therefore suitable for study of the mechanisms involved when proteins fragment under electron capture dissociation (ECD). The dissociative recombination cross sections for both protonated DMDS and protonated N-methylacetamide were determined at electron energies ranging from 0.001 to 0.3 eV. Also, the branching ratios at 0 eV center-of-mass collision energy were determined. The present results give support for the indirect mechanism of ECD, where free hydrogen atoms produced in the initial fragmentation step induce further decomposition. Probably both indirect and direct dissociations play a role in ECD.
Fulltext version: Published version
License (according to publishing contract): Licence according to publishing contract
Departement: Life Sciences and Facility Management
Organisational Unit: Institute of Chemistry and Biotechnology (ICBT)
Appears in Collections:Publikationen Life Sciences und Facility Management

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