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ESI analysis of cholesterol and cholesteryl esters extracted from LDL and oxLDL. (A) Precursors of m/z 369 (m/z 200–900) total ion chromatogram of LDL-L. (B) Precursor ion scan of m/z 369.4 total ion chromatogram of oxLDL-L lipid extract. The region of the spectrum showing the appearance of signals (m/z 544 and 558) related to LDL oxidation is shown in the inset.
