Figure 7.

The Controlled Mixture dataset fit with the basic PeptideProphet and the semiparametric version. The Controlled Mixture dataset fit with the basic PeptideProphet and the semiparametric version of PeptideProphet utilizing the kernel density estimator. The smoothed estimator allowed for a more fine-tuned fit to the estimated (asymmetric) distribution of the correctly identified spectra.

Ma et al. BMC Bioinformatics 2012 13(Suppl 16):S1   doi:10.1186/1471-2105-13-S16-S1