Structures of α-type ions formed in the 157 nm photodissociation of singly-charged peptide ions
Journal Article
·
· Journal of the American Society for Mass Spectrometry
One hundred fifty-seven nm photodissociation of singly-charged peptide ions induces the cleavage of α-carbon to carbonyl-carbon bonds along the backbone. a{sub n} + 1 radical ions are observed as the primary photolysis products of peptides with N-terminal arginines in a linear ion trap mass spectrometer. The radical elimination pathways undertaken by the a{sub n} + 1 radical ions to form more stable even-electron species are studied in hydrogen-deuterium (H/D) exchange experiments. Two types of a{sub n} ions along with d-type ions are observed as secondary elimination products. The relative abundance of each depends on the C-terminal residue of the radical fragment ion.
- OSTI ID:
- 22774018
- Journal Information:
- Journal of the American Society for Mass Spectrometry, Journal Name: Journal of the American Society for Mass Spectrometry Journal Issue: 9 Vol. 17; ISSN 1044-0305; ISSN JAMSEF
- Country of Publication:
- United States
- Language:
- English
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