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. Author manuscript; available in PMC: 2011 Jan 15.
Published in final edited form as: Anal Chem. 2010 Jan 15;82(2):579–584. doi: 10.1021/ac9018582

Figure 1.

Figure 1

Histogram of the frequency of matching ions in ETD spectra as a function of the mass error between theoretical and observed m/z. Data was binned into 0.05 Da intervals. The blue line shows results for all assignments, whereas the red and green lines separate results by charge state of assignment.