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Article: Molecular radical cations of oligopeptides

TitleMolecular radical cations of oligopeptides
Authors
Issue Date2000
PublisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/journal/jpcbfk
Citation
Journal Of Physical Chemistry B, 2000, v. 104 n. 15, p. 3393-3397 How to Cite?
AbstractAn unprecedented method of producing molecular radical cations of oligopeptides in the gas phase has been discovered. Electrospraying a methanolic mixture of a Cu(II)-amine complex, e.g., CuII(dien)(NO3)2 (where dien = diethylenetriamine), and an oligopeptide (M) yields the [CuII(dien)M]·2+ ion, whose collision-induced dissociation (CID) produces [CuI(dien)]+ and M·+, the molecular cation of the oligopeptide. Abundant M·+ is apparent when the oligopeptide contains both a tyrosyl and a basic residue-arginyl, lysyl, or histidyl. These structural requirements are similar to those in the metalloradical enzyme process in photosystem II. Tandem mass spectrometry of M·+ produces fragment ions that are both common to and also different from [M + H]+. The fragmentation chemistry of M·+ and of its products appear to be radical driven. © 2000 American Chemical Society.
Persistent Identifierhttp://hdl.handle.net/10722/167934
ISSN
2015 Impact Factor: 3.187
2015 SCImago Journal Rankings: 1.414
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorChu, IKen_US
dc.contributor.authorRodriquez, CFen_US
dc.contributor.authorLau, TCen_US
dc.contributor.authorHopkinson, ACen_US
dc.contributor.authorMichael Siu, KWen_US
dc.date.accessioned2012-10-08T03:13:07Z-
dc.date.available2012-10-08T03:13:07Z-
dc.date.issued2000en_US
dc.identifier.citationJournal Of Physical Chemistry B, 2000, v. 104 n. 15, p. 3393-3397en_US
dc.identifier.issn1520-6106en_US
dc.identifier.urihttp://hdl.handle.net/10722/167934-
dc.description.abstractAn unprecedented method of producing molecular radical cations of oligopeptides in the gas phase has been discovered. Electrospraying a methanolic mixture of a Cu(II)-amine complex, e.g., CuII(dien)(NO3)2 (where dien = diethylenetriamine), and an oligopeptide (M) yields the [CuII(dien)M]·2+ ion, whose collision-induced dissociation (CID) produces [CuI(dien)]+ and M·+, the molecular cation of the oligopeptide. Abundant M·+ is apparent when the oligopeptide contains both a tyrosyl and a basic residue-arginyl, lysyl, or histidyl. These structural requirements are similar to those in the metalloradical enzyme process in photosystem II. Tandem mass spectrometry of M·+ produces fragment ions that are both common to and also different from [M + H]+. The fragmentation chemistry of M·+ and of its products appear to be radical driven. © 2000 American Chemical Society.en_US
dc.languageengen_US
dc.publisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/journal/jpcbfken_US
dc.relation.ispartofJournal of Physical Chemistry Ben_US
dc.titleMolecular radical cations of oligopeptidesen_US
dc.typeArticleen_US
dc.identifier.emailChu, IK:ivankchu@hku.hken_US
dc.identifier.authorityChu, IK=rp00683en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1021/jp994487d-
dc.identifier.scopuseid_2-s2.0-20644436693en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-20644436693&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume104en_US
dc.identifier.issue15en_US
dc.identifier.spage3393en_US
dc.identifier.epage3397en_US
dc.identifier.isiWOS:000086655600003-
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridChu, IK=7103327484en_US
dc.identifier.scopusauthoridRodriquez, CF=7004085075en_US
dc.identifier.scopusauthoridLau, TC=7102222310en_US
dc.identifier.scopusauthoridHopkinson, AC=15067169300en_US
dc.identifier.scopusauthoridMichael Siu, KW=8967015800en_US

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