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. 2019 May 21;10:575. doi: 10.3389/fphar.2019.00575

FIGURE 1.

FIGURE 1

Typical extracted ion chromatograms from LC/MS analysis of (A) TMAO and (B) glycine standard dilution (ion extracted at m/z = 76.0 in positive mode). As glycine is present in plasma and having both the same TMAO molecular weight and ability to be ionized in positive mode, the two different retention times allow to discriminate TMAO in biological fluid from other compounds with similar chemical features.