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Reconstructed ion chromatograms of PhIP and LQQC*PF (C-[S=O]-PhIP) sulfinamide, which formed by reaction HONH-PhIP or NO-PhIP with SA, followed by digestion with trypsin/chymotrypsin. LQQC*PF (C-[S=O]-[2H5]-PhIP served as an internal standard. Non-modified SA and SA pretreated with 4-CMBA prior to reaction with NO-PhIP served as negative controls.
