Chemical. CAS: 94367-20-1. Formula: C29H33N3O8. MW: 551.6. Fluorogenic substrate for measuring the chymotrypsin-like peptidase activity of the 20S proteasome. Fluorogenic substrate for calpain and papain. Peptide substrate for Ti protease from E.coli. Excitation: 360nm. Emission: 460nm. This substrate is useful for inhibitor screening and kinetic analysis. - Fluorogenic substrate for measuring the chymotrypsin-like peptidase activity of the 20S proteasome. Fluorogenic substrate for calpain and papain. Peptide substrate for Ti protease from E.coli. Excitation: 360nm. Emission: 460nm. This substrate is useful for inhibitor screening and kinetic analysis.