Figure 2. Analysis of synthetic peptides by high resolution LC-MS/MS. Total ion current (TIC) chromatogram of the peptide mixture (А). Extracted ion chromatogram of the peptide ion m/z = 905.4727 and z = 2+, which corresponds to LNDTTLQVLNTWYTK peptide [sequence site from 409 to 423 of the Q6UX06 (Olfactomedin-4 OS=Homo sapiens GN=OLFM4 PE=1 SV=1)] (B). Fragment spectra of the precursor ion m/z = 905.4727 (C). Distribution of precursor ions density in a crude peptide mixture. The zoomed area which corresponds to the peptide ion of m/z 905.4727 and RT 4 min is shown in insert. (D).