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Extracted ionic current (EIC) traces for: (a) m/z = 616.2 (Heme, M+); (b) m/z = 551.3 (“Complete” heme-PA1259 adducts 3 and/or 4, MH+/2); (c) m/z = 730.3 (heme-PA1259 adduct 5, MH+). (Inserts correspond to the mass spectra of chromatographic peaks with arrows).
