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Article: Formation of molecular radical cations of aliphatic tripeptides from their complexes with Cu II(12-crown-4)

TitleFormation of molecular radical cations of aliphatic tripeptides from their complexes with Cu II(12-crown-4)
Authors
Issue Date2004
PublisherJohn Wiley & Sons Ltd. The Journal's web site is located at http://www.interscience.wiley.com/jpages/0951-4198/
Citation
Rapid Communications In Mass Spectrometry, 2004, v. 18 n. 16, p. 1798-1802 How to Cite?
AbstractMolecular radical cations have proven to be difficult to generate from aliphatic peptides under electrospray ionization mass spectrometry (ESI-MS) conditions. For a family of small aliphatic peptides GGX, where X=G, A, P, I, L and V, these cations have been generated by electrospraying a mixture of Cu .2+, 12-crown-4 and GGX in methanol/water. GGX .+ is readily formed from the collision-induced dissociation (CID) of [Cu II(12-crown-4)(GGX)] .2+. The formation of these aliphatic peptide radical ions from these complexes, in cases where it is not possible from the corresponding complexes involving a series of amine ligands instead of 12-crown-4, is likely due to the second ionization energy of the [Cu I(12-crown-4)(GGX)] + complex being higher than that of the corresponding [Cu I(amine)(GGX)] + complex. Using these 12-crown-4 complexes, GGI can be differentiated from the isomeric GGL by comparing the CID spectra of their [a 3+H] .+ ions. Copyright © 2004 John Wiley & Sons, Ltd.
Persistent Identifierhttp://hdl.handle.net/10722/168287
ISSN
2015 Impact Factor: 2.226
2015 SCImago Journal Rankings: 0.819
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorChu, IKen_US
dc.contributor.authorSiu, SOen_US
dc.contributor.authorLam, CNWen_US
dc.contributor.authorChan, JCYen_US
dc.contributor.authorRodriquez, CFen_US
dc.date.accessioned2012-10-08T03:17:04Z-
dc.date.available2012-10-08T03:17:04Z-
dc.date.issued2004en_US
dc.identifier.citationRapid Communications In Mass Spectrometry, 2004, v. 18 n. 16, p. 1798-1802en_US
dc.identifier.issn0951-4198en_US
dc.identifier.urihttp://hdl.handle.net/10722/168287-
dc.description.abstractMolecular radical cations have proven to be difficult to generate from aliphatic peptides under electrospray ionization mass spectrometry (ESI-MS) conditions. For a family of small aliphatic peptides GGX, where X=G, A, P, I, L and V, these cations have been generated by electrospraying a mixture of Cu .2+, 12-crown-4 and GGX in methanol/water. GGX .+ is readily formed from the collision-induced dissociation (CID) of [Cu II(12-crown-4)(GGX)] .2+. The formation of these aliphatic peptide radical ions from these complexes, in cases where it is not possible from the corresponding complexes involving a series of amine ligands instead of 12-crown-4, is likely due to the second ionization energy of the [Cu I(12-crown-4)(GGX)] + complex being higher than that of the corresponding [Cu I(amine)(GGX)] + complex. Using these 12-crown-4 complexes, GGI can be differentiated from the isomeric GGL by comparing the CID spectra of their [a 3+H] .+ ions. Copyright © 2004 John Wiley & Sons, Ltd.en_US
dc.languageengen_US
dc.publisherJohn Wiley & Sons Ltd. The Journal's web site is located at http://www.interscience.wiley.com/jpages/0951-4198/en_US
dc.relation.ispartofRapid Communications in Mass Spectrometryen_US
dc.subject.meshCationsen_US
dc.subject.meshCopper - Chemistryen_US
dc.subject.meshMetalloproteins - Chemistryen_US
dc.subject.meshOligopeptides - Chemistryen_US
dc.subject.meshSpectrometry, Mass, Electrospray Ionizationen_US
dc.titleFormation of molecular radical cations of aliphatic tripeptides from their complexes with Cu II(12-crown-4)en_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.doi10.1002/rcm.1551en_US
dc.identifier.pmid15329872-
dc.identifier.scopuseid_2-s2.0-4143121176en_US
dc.identifier.hkuros98453-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-4143121176&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume18en_US
dc.identifier.issue16en_US
dc.identifier.spage1798en_US
dc.identifier.epage1802en_US
dc.identifier.isiWOS:000223365000003-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridChu, IK=7103327484en_US
dc.identifier.scopusauthoridSiu, SO=8603087200en_US
dc.identifier.scopusauthoridLam, CNW=7402990888en_US
dc.identifier.scopusauthoridChan, JCY=55230705500en_US
dc.identifier.scopusauthoridRodriquez, CF=7004085075en_US

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