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. Author manuscript; available in PMC: 2011 Jan 1.
Published in final edited form as: J Am Soc Mass Spectrom. 2009 Sep 17;21(1):80. doi: 10.1016/j.jasms.2009.09.007

Figure 1.

Figure 1

The change in the SEQUEST Xcorr and ΔCn parameters for DTAs generated from LTQ MS2 scans as a consequence of determining the monoisotopic mass and charge state of the original precursor mass of the scan. The sample represents an IEF fraction of a urine tryptic digest that contained six abundant proteins (◆) with lower levels of others (●). The Xcorr (A) and ΔCn (B) obtained from the unmodified DTAs are represented along the horizontal axis while the results obtained from the MAZIE-modified DTAs are along the vertical axis.