Figure 3From: Correcting for the effects of natural abundance in stable isotope resolved metabolomics experiments involving ultra-high resolution mass spectrometry12 C/13 C isotopologues of phosphatidylcholine 34:1. Bar chart of 13C natural abundance contaminated (red) and corrected (green) sets of isotopologues. The lipid metabolite contains 34 carbons in the 2 fatty acid chains, 3 carbons in the glycerol, and 5 carbons in the choline head group.Back to article page