See J. Rozenski et al., Org. Mass Spectrom., 29 (1994) 654-658.
This computer program helps to inteprete collision induced mass spectra (MS/MS or linked scan) of oligopeptides.
The peptides may also contain unnatural or modified amino acids. It is based on the generation
of all combinations for a given molecular mass and, by permutation, generation of all possible
fragments and comparison with experimental data. A score is given based on the mean deviation of
'recognized peaks' with the experimental data.
Currently 2 versions of the program are downloadable, both running on a PC :