Figure 4From: Deglycosylation and label-free quantitative LC-MALDI MS applied to efficient serum biomarker discovery of lung cancer A frequency distribution plot of the coefficients of variations (CV) calculated for each of the 2,356 common peak clusters. Bars represent the frequency percentage and lines represent the cumulative frequency. Filled bars and boxes, replicates with deglycosylation; blank bars and crosses, untreated replicates (n = 6).Back to article page