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. Author manuscript; available in PMC: 2014 May 1.
Published in final edited form as: Cancer Prev Res (Phila). 2013 Mar 12;6(5):419–427. doi: 10.1158/1940-6207.CAPR-12-0364

Figure 2.

Figure 2

Positive ion nanoelectrospray PQD and collision-induced dissociation product ion tandem mass spectrum of peptide ALPGQLKPFETLLSQNQGGK from GSTP1 protein which was up-regulated in the cytosolic/membrane fraction. The triply protonated precursor ion was observed at m/z 853.831 corresponding to an uncharged mass of 2558.47 u (ΔM 2.2 ppm). Note the iTRAQ reporter ions of m/z 114, m/z 116 and m/z 144 that were used for the determination of relative protein expressionin PrEcells treated with lycopene or placebo beadlets.