Fluorogenic substrate for measuring the chymotrypsin-like peptidase activity of the 20S proteasome. This substrate is useful for inhibitor screening and kinetic analysis.Excitation: Excitation: 345nm. Emission: 445nm.Molecular Formula:C36H48N4O7Molecular Weight:648.8Sequence: Z-Leu-Leu-Leu-7-amido-4-methylcoumarin Solubility:Soluble in DMSO.Storage and Stability:Stable for at least 1 year after receipt when stored at -20°C.