Fluorogenic tri-peptide substrate for measuring the trypsin-like peptidase activity of the 20S proteasome. Substrate for the Kex2 endopeptidase from S. Cervisiae, which has substrate specificity toward the C-terminal side of LR, PR and RR sequences. Can be cleaved by Kallikrein 5 with a P1 site preference for basic residues (R and K). This substrate is useful for inhibitor screening and kinetic analysis.Excitation: Excitation: 380nm. Emission: 460nm.Molecular Formula:C33H52N10O7 . HClMolecular Weight:773.8 . 36.5Sequence: Boc-Leu-Arg-Arg-7-amido-4-methylcoumarin Solubility:Soluble in methanol (50mg/ml).Storage and Stability:Stable for at least 1 year after receipt when stored at -20°C.