Figure 2
From: Enhanced peptide quantification using spectral count clustering and cluster abundance
Pattern-plots of reference spectrum and experimental MS/MS spectra in clustered spectral sets. This figure shows pattern-plots the of the experimental MS/MS spectra with plotted using positive intensities (upper part) and the reference spectrum using negative intensities (lower part). Then, (a) all of nine spectra were identified as a same peptide, while (b) two of the eleven spectra are not identified by SEQUEST and (c) four of the seven spectra were only identified by SpectraST, although pattern-plots are very similar.