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Origin of Product Ions in the MS/MS Spectra of Peptides in a Quadrupole Ion Trap
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Origin of Product Ions in the MS/MS Spectra of Peptides in a Quadrupole Ion Trap
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Origin of Product Ions in the MS/MS Spectra of Peptides in a Quadrupole Ion Trap
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Journal Article
Origin of Product Ions in the MS/MS Spectra of Peptides in a Quadrupole Ion Trap
1998
Overview
Stored waveform inverse Fourier transform and double resonance techniques have been used in conjunction with a quadrupole ion trap to study the dissociation patterns of peptide ions. These experiments provide insight into the origin of individual product ions in an MS/MS spectrum. Results show for a series of leucine enkephalin analogues with five amino acid residues that the
b
4
ion is the main product ion through which many other product ions arise. It was also observed that the percentage of the
a
4
product ions that are formed directly from the protonated molecule (M+H)
+ depends on the nature of the fourth amino acid residue. In addition, it was determined that in the peptides studied here lower series
b ions (e.g.,
b
3
) arise from direct dissociation of higher series
b ions (e.g.,
b
4
) only about 50% of the time.
Publisher
Elsevier Inc,Elsevier Science,Springer Nature B.V
Subject
Aminoacids, peptides. Hormones. Neuropeptides
/ Analytical, structural and metabolic biochemistry
/ Biological and medical sciences
/ Enkephalin, Leucine - analogs & derivatives
/ Enkephalin, Leucine - analysis
/ Exact sciences and technology
/ Fundamental and applied biological sciences. Psychology
/ Ions
/ Leucine
/ Peptides
/ Proteins
