Contains 12 ready-to-use individual protease inhibitors for characterization of protease activity. Each set contains the following protease inhibitors. See individual inhibitors for their specificities and other information.: AEBSF ALLN Antipain, dihydrochloride Aprotinin Bestatin Chymostatin E-64 EDTA-Na2 Leupeptin Pepstatin Phosphoramidon PMSF Each protease inhibitor is supplied in a ready-to-use solution at a 100X concentration. The 1X concentration of the protease inhibitors is designed to give >90% inhibition in crude tissue extracts. Various concentrations and/or combinations of protease inhibitors may be used to inhibit a broad spectrum of protease activity. The Protease Inhibitor Set can be used to design specific protease inhibitor cocktails, supplement existing cocktails or to screen for specific protease classes.