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Representative extracted ion chromatograms for 5-methyl-cytidine and cytidine (124.0516 and 110.0359 m/z) from MS2 scans using AIF and 900 m/z with 601 m/z scan window for negative control serum and serum fortified with the PS-1, MYO, and EGL9 oligonucleotides at the high QC level.
