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COMPARISON OF HELIUM AND ARGON AS COLLISION GASES IN THE HIGH-ENERGY COLLISION-INDUCED DECOMPOSITION OF MH+ IONS OF PEPTIDES
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UNSPECIFIED (1992) COMPARISON OF HELIUM AND ARGON AS COLLISION GASES IN THE HIGH-ENERGY COLLISION-INDUCED DECOMPOSITION OF MH+ IONS OF PEPTIDES. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY, 3 (5). pp. 502-514. ISSN 1044-0305.
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Abstract
Collision-induced decompositions (CID) of protonated peptides were studied using a four-sector mass spectrometer. The collision gases employed were helium and argon. The CID spectra of several peptides covering the molecular mass region of 905-2465 u were recorded. These investigations established several previously unrecognized differences between the CID spectra obtained with helium and argon as collision gases. These can be summarized as follows: (1) Structurally significant and specific side chain fragmentations (d(n), w(n), and v(n) ion types) are greatly reduced or completely missing in the CID spectra obtained with helium as a collision gas compared to those obtained with argon. (2) As the peptide molecular mass increases, argon, which is heavier than helium, is increasingly more efficient than helium for generating fragment ions.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QD Chemistry Q Science > QC Physics |
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Journal or Publication Title: | JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY | ||||
Publisher: | ELSEVIER SCIENCE INC | ||||
ISSN: | 1044-0305 | ||||
Official Date: | July 1992 | ||||
Dates: |
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Volume: | 3 | ||||
Number: | 5 | ||||
Number of Pages: | 13 | ||||
Page Range: | pp. 502-514 | ||||
Publication Status: | Published |
Data sourced from Thomson Reuters' Web of Knowledge
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