Fig. 5
From: Metabolomic biomarkers discovery across chronic gastritis to gastric cancer progression
Chromatographic, mass spectrometry, and structural information for the potential biomarkers DHEAS and L-TA. (A) Extracted ion chromatograms for DHEAS and L-TA in simulated blank serum and participant-derived serum; (B) Structure of DHEAS and its secondary mass spectra (MS2) derived from the standard, LRMS (UPLC-MRM-EPI), and HRMS (UPLC-Full Scan-ddMS2) analyses of the serum samples; (C) Structure of L-TA and its secondary mass spectra (MS2) derived from standard, LRMS (UPLC-MRM-EPI), and HRMS (UPLC-Full Scan-ddMS2) analyses of the serum samples.
