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Photograph of the upper half of a heart stained with 2,3,5-triphenyltetrazolium chloride (TTC) following LAD coronary artery ligation (a). Unstained tissue, outlined in blue, indicates tissue damage from myocardial necrosis. MS image of m/z 132 intensity divided by the TIC (b) and MS2 image of m/z 132 → 90 intensity (c) from the lower half of the same heart depicted in (a). Lower ion signal was observed in the infarcted region near the right side of the tissue section.
