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Titolo:
193 NM PHOTODISSOCIATION OF LARGER MULTIPLY-CHARGED BIOMOLECULES
Autore:
GUAN ZQ; KELLEHER NL; OCONNOR PB; AASERUD DJ; LITTLE DP; MCLAFFERTY FW;
Indirizzi:
CORNELL UNIV,BAKER LAB CHEM ITHACA NY 14853 CORNELL UNIV,BAKER LAB CHEM ITHACA NY 14853
Titolo Testata:
International journal of mass spectrometry and ion processes
, volume: 158, anno: 1996,
pagine: 357 - 364
SICI:
0168-1176(1996)158:<357:1NPOLM>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
TANDEM MASS-SPECTROMETRY; INFRARED MULTIPHOTON DISSOCIATION; SURFACE-INDUCED DISSOCIATION; ACTIVATED DISSOCIATION; IONS; FRAGMENTATION; PROTEINS; OLIGONUCLEOTIDES; VERIFICATION; EXCITATION;
Keywords:
FOURIER TRANSFORM ION CYCLOTRON RESONANCE; ELECTROSPRAY; PHOTODISSOCIATION; 193 NM;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
38
Recensione:
Indirizzi per estratti:
Citazione:
Z.Q. Guan et al., "193 NM PHOTODISSOCIATION OF LARGER MULTIPLY-CHARGED BIOMOLECULES", International journal of mass spectrometry and ion processes, 158, 1996, pp. 357-364

Abstract

In contrast to most ion dissociation methods, 193 nm ultraviolet photodissociation of electrosprayed melittin (2.8 kDa) and ubiquitin (8.6 kDa) molecular ions yields new c and z ions (backbone amine bond dissociation) that provide additional sequence information. Dissociation bycollisions or infrared photons produce b and y ions; for cleavages between the same amino acids the c ion represents the addition of NH2 tothe b ion, and z the loss of NH2 from the y ion, so that these ions can be differentiated by this +/- 16.02 Da difference. However, 193 nm photodissociation of 12-29 kDa ions as yet does not give collectable product ions, and that of the very stable y(18)(2+) ion from ubiquitin only effects a side chain loss. 193 nm irradiation of negative ions ofall-T 30-mer DNA appears to eject electrons; apparently this is the first observation of electron photodetachment from multiply-charged negative ions.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 14/07/20 alle ore 19:46:47