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Figure 2 | BMC Bioinformatics

Figure 2

From: Optimization of filtering criterion for SEQUEST database searching to improve proteome coverage in shotgun proteomics

Figure 2

Relationship between the number of peptide identifications and Xcorr values in different criteria which leaded to these identifications for human liver tissue lysate at same FDR (<1%). To achieve less than 1% FDR, ΔCn cutoff for each criterion changes with the Xcorr cutoff. Curves for three different charge states were drawn separately: A) for singly charged peptides, B) for triply charged peptides and C) for doubly charged peptides. D) is the zoomed curve for singly charged peptides.

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