(Z-LL)2 Ketone is a selective inhibitor of signal peptide peptidase (SPP) that inhibits processing of the p-Prl signal peptide (IC50 = ~ 50 nM) without affecting the activities of signal peptidases and other proteases such as lysosomal cathepsins and proteasomes.
(Z-LL)2 Ketone serves as an inverse ?-secretase modulator (iGSM) by changing processivity of ?-secretase cleavage.