Figure 7. Z-Arg-Lys-AOMK and Z-Glu-Lys-AOMK inhibitors of cathepsin B at neutral pH compared to acidic pH conditions.
(a) Z-Arg-Lys-AOMK inhibitor. Z-Arg-Lys-AOMK inhibition of cathepsin B was assessed at different inhibitor concentrations to determine IC50 values at pH 7.2 and pH 4.6. Z-Phe-Arg-AMC was used as substrate for cathepsin B assays.
(b) Z-Glu-Lys-AOMK inhibitor. The inhibitor Z-Glu-Lys-AOMK at different concentrations was assessed for IC50 values at pH 4.6 and pH 7.2.