Figure 3
From: Proteomic analysis of total cellular proteins of human neutrophils
MS/MS profile of ion M+2H = 720.887. Tandem mass spectrum of parent ion (indicated by Pi in the Figure). As the result of collisions, the peptide was randomly fragmented at each peptide bond, resulting in carboxy-terminal y ions or amino-terminal b ions. When the fragment masses were submitted to Mascot, the peptide was identified as LGLGADVAQVTGALR from protein matrix metalloproteinase-9 (MMP-9) (inset, with detected y and b ions represented).