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Propachlor modifies a catalytic cysteine in the active site. (A) MS2 fragmentation spectrum obtained from the LC-MS/MS shotgun proteomics analysis of lysate collected from propachlor-treated (1 mM, 30 min, serum-free media) HEK293T cells. This peptide is modified at the C152 position with an adduct that corresponds to propachlor thiocarbamate. C156 is carbamidoylated by iodoacetamide. (B) PRM chromatograms demonstrating the dependence of the adduct on propachlor treatment.
