Fig. 5From: Critical Evaluation of Product Ion Selection and Spectral Correlation Analysis for Biomarker Screening Using Targeted Peptide Multiple Reaction MonitoringCross-validation. The 6,227 spectra were separated into two groups for each search engine, depending on whether they were assigned to one of the target 12 peptides. a, b shows the score histograms for true and false positive matches, respectivelyBack to article page