Fig. 1.

Number of cleavage sites present in the spectra. Box plots show the numbers of fragmentation cleavage sites present in the spectra for peptides of length 6 to 30. The combined results of all the CID spectra from this study are shown in A, with the HCD spectra from this study shown in B. The relative numbers of spectra per length are indicated by the blue dots, and the mean number of fragmentation cleavage sites present is shown by the blue line. The mode of each peptide length is highlighted by the green bar and the maximum number that could be present (peptide length – 1) is shown by the red line.