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. 2010 Nov;51(11):3377–3388. doi: 10.1194/jlr.D008391

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Copyright © 2010 by the American Society for Biochemistry and Molecular Biology, Inc.

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Fig. 4. — Structure and fragmentation scheme of CE (upper right); EIC of total CE (A), CE 16:1 (A1), and CE 18:1 (A2) following RR-RP-HPLC separation and +ESI/TOF-MS detection of pooled sebum; PI scan spectra of CE 16:1 (B1), and CE 18:1 (B2) in sebum separated in the same chromatographic conditions. PI scans of CE were achieved with the collision energy and the fragmentor voltage set at 24 and 140 V, respectively. CE, cholesteryl/cholesterol ester; EIC, extracted ion chromatogram; PI, product ion; RR-RP-HPLC, rapid resolution reversed-phase HPLC; TOF, time of flight.