(Benzyloxycarbonyl)-Leu-Leu-phenylalaninal Z-LLF-CHO White lyophilized solid. PROTECT FROM MOISTURE. A potent, cell-permeable, and reversible proteasome inhibitor. Inhibits the chymotrypsin-like activity of the pituitary multicatalytic proteinase complex (MPC; Ki = 460 nM). Does not inhibit the peptidyl-glutamyl peptide hydrolyzing activity of MPC even at concentrations of 200 µM. Also blocks the decay of IkB-a and IkB-b proteins in exponentially growing WEHI 231 cells. Purity: ≥95% by HPLC. Z-Leu-Leu-Phe-CHO Ref.: Schauer, S.L., et al. 1998. J. Immunol. 160, 4398. Orlowski, M., et al. 1997. Biochemistry 36, 13946. Orlowski, M., et al. 1993. Biochemistry 32, 1563. |