Figure 7
From: Label-free peptide profiling of Orbitrap™ full mass spectra
MS1 spectrum containing a low intensity triple charged peptide peak with mass 581.69 Da, only detected in Peptrix. The peak at mass 581.69 Da is in an overlapping cluster of triple charged peptide isotopes of approximately 0.33 Da distance. Recalculated to the MH+ value of 1743.0515 Da, the mass is only detected by Peptrix and absent in the peptide profile matrices from the other software packages.