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. Author manuscript; available in PMC: 2015 Sep 14.
Published in final edited form as: J Proteome Res. 2005 Sep-Oct;4(5):1863–1866. doi: 10.1021/pr050150e

Figure 1.

Figure 1

Calibration curve representing signal intensity ratios of thiophosphopeptide to phosphopeptide in both linear positive and negative modes (calculated as area under the curve) compared to the ideal ratio.