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. Author manuscript; available in PMC: 2020 Jun 4.
Published in final edited form as: Anal Chem. 2019 May 13;91(11):7403–7410. doi: 10.1021/acs.analchem.9b01351

Figure 2.

Figure 2.

(A) Proposed MS/MS fragmentation of PMOA-dR ([M+H]+ m/z 241.1) and [13C5]-PMOA-dR ([M+H]+ m/z 246.1). (B) Extracted ion chromatogram (EIC) of PMOA-dR (at background level normalized against the base peak in LLOQ, and at LLOQ) and [13C5]-PMOA-dR (1.1 per 106 nts) in DNA digestion matrix and (C) PMOA-dR and [13C5]-PMOA-dR MS/MS spectra. The * represent the sites of the 13C atoms in the internal standard.