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. 1992 Feb;6(2):95-7.
doi: 10.1002/rcm.1290060205.

Fragmentation studies of peptides: the formation of y ions

P T Kenny  1 , K Nomoto, R Orlando
Affiliations

Fragmentation studies of peptides: the formation of y ions

P T Kenny et al. Rapid Commun Mass Spectrom. 1992 Feb.

Abstract

The mechanism for the formation of y ions in the collision-induced dissociation (CID) spectra of protonated peptides produced by fast-atom bombardment was investigated by tandem mass spectrometry and deuterium labelling studies. The results show that a hydrogen atom attached to nitrogen and not to carbon migrates during cleavage of the amide bond. A mechanism based on these results is presented.

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