Fragmentation reactions of protonated peptides containing glutamine or glutamic acid.

  title={Fragmentation reactions of protonated peptides containing glutamine or glutamic acid.},
  author={Alex G. Harrison},
  journal={Journal of mass spectrometry : JMS},
  volume={38 2},
A variety of protonated dipeptides and tripeptides containing glutamic acid or glutamine were prepared by electrospray ionization or by fast atom bombardment ionization and their fragmentation pathways elucidated using metastable ion studies, energy-resolved mass spectrometry and triple-stage mass spectrometry (MS(3)) experiments. Additional mechanistic information was obtained by exchanging the labile hydrogens for deuterium. Protonated H-Gln-Gly-OH fragments by loss of NH(3) and loss of H(2)O… CONTINUE READING


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