Figure 3From: Deglycosylation and label-free quantitative LC-MALDI MS applied to efficient serum biomarker discovery of lung cancer Volcano plot showing the difference in the peptide profiles of deglycosylated and untreated serum sample. Crosses represent peak clusters identified as normal peptides or not identified in the analysis, and squares represent deglycosylated peptides identified with +3 Da modification.Back to article page