Figure 2
From: A Dynamic Noise Level Algorithm for Spectral Screening of Peptide MS/MS Spectra
Example noise and peptide tandem mass spectra before and after noise reduction. An example tandem mass spectrum from a blank run (a) with 39 peaks before DNL noise reduction and (b) with 3 signal peaks after DNL noise reduction, and an example tandem mass spectrum for a peptide (c) with 279 peaks in it before DNL noise reduction and (d) with 46 signal peaks in it after DNL noise reduction.