Fragmentations of dipeptides in plasma desorption mass spectrometry: New rules for the sequence elucidation of oligopeptides

This is the authors' abstract. We don't add key points for this paper.

252Cf plasma desorption mass spectrometry is well suited for determining both composition and sequence of unknown small oligopeptides. A systematic study of a large number of dipeptides first leads to establishing common rules of fragmentation from positive ion mass spectra. These rules are then applied to the sequence elucidation of larger peptides.