N^α-Tosyl-Lys Chloromethyl Ketone, Hydrochloride-CAS 4238-41-9-Calbiochem

C₁₄H₂₁ClN₂O₃S · xHCl

332.85 (free base basis)

Inhibits trypsin-like serine proteases. Inactivates trypsin irreversibly without affecting chymotrypsin. Prevents nitric oxide production by activated macrophages by interfering with transcription of the iNOS gene. Blocks cell-cell adhesion and binding of HIV-1 virus to target cells. In macrophages, blocks nitric oxide synthase induced by interferon-γ and lipopolysaccharides (EC₅₀ = 80 µM). Prevents endonucleolysis accompanying apoptotic death of HL-60 leukemic cells and normal thymocytes. Suggesting working concentration is 10-100 µM.
Inhibits trypsin-like serine proteinases. Irreversibly inactivates trypsin without affecting chymotrypsin. Prevents nitric oxide production by activated macrophages by interfering with transcription of the iNOS gene. Blocks cell-cell adhesion and binding of HIV-1 virus to the target cells. In macrophages, blocks nitric oxide synthase induced by interferon-γ and lipopolysaccharides (EC₅₀ = 80 µM). Prevents endonucleolysis accompanying apoptotic death of HL-60 leukemia cells and normal thymocytes.

EC50 = 80 µM blocking nitric oxide synthase induced by interferon-γ and lipopolysaccharides in macrophages
Product does not compete with ATP.
Reversible: no
Cell permeable: no
Primary Target
trypsin like proteases

Toxicity: Irritant (B)

Unstable in solution; reconstitute just prior to use.

Griscavage, J.M., et al. 1995. Biochem. Biophys. Res. Commun.215, 721.
Kim, H., et al. 1995. J. Immunol.154, 4741.
Bourinbaiar, A.S. and Nagorny, R. 1994. Cell Immunol. 155, 230.
Biro, A., et al. 1992. Eur. J. Immunol.22, 2547.
Bruno, S., et al. 1992. Leukemia6, 1113.
Lee, S.F. 1992. Infect. Immun. 60, 4032.
Schmidt, H.H., et al. 1992. Mol. Pharmacol.41, 615.

CALBIOCHEM is a registered trademark of Merck KGaA, Darmstadt, Germany

100

≥95% (elemental analysis)

solid

Calbiochem^®

OK to freeze
desiccated (hygroscopic)

off-white

aqueous solution, pH <6.0: 1 mg/mL

ambient

2-8℃

1S/C14H21ClN2O3S.ClH/c1-11-5-7-12(8-6-11)21(19,20)17-13(14(18)10-15)4-2-3-9-16;/h5-8,13,17H,2-4,9-10,16H2,1H3;1H/t13-;/m0./s1

YFCUZWYIPBUQBD-ZOWNYOTGSA-N

50, 250 mg in Plastic ampoule

11 - Combustible Solids

WGK 3