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CAS 4272-74-6 — N alpha-Tosyl-L-lysine-chloromethyl ketone hydrochloride (TLCK)

N alpha-Tosyl-L-lysine-chloromethyl ketone hydrochloride (TLCK) is a synthetic, irreversible serine protease inhibitor widely used in biochemical research to study enzyme mechanisms, particularly in the investigation of trypsin and related proteases. It selectively modifies active-site histidines, aiding in the characterization of proteolytic activity and enzyme-substrate interactions. TLCK has a CAS number of 4272-74-6, with the molecular formula C14H22Cl2N2O3S and a molecular weight of 369.30708. It requires storage at -18°C and carries no signal word for hazard classification. Molekula supplies TLCK from research to bulk quantities with full documentation and ISO 9001:2015 traceability.