Can be used in conjunction with E64-d and Leupeptin A to inhibit the degradation of autophagic cargo inside autophagosomes. For this application, the working concentration is typically between 1-10 μM. Can be used in conjunction with E64-d and Leupeptin A to inhibit the degradation of autophagic cargo inside autophagosomes. For this application, the working concentration is typically between 1-10 μM. An inhibitor of HIV-1 and aspartic proteases. Pepstatin A inhibits the aspartic proteases cathepsin D, pepsin, and renin. Additionally, it suppresses p53-dependent apoptosis in lymphoid cells as well as TNFα-induced apoptosis in U937 cells. Pepstatin A also efficiently inhibits HIV-1 protease and Fcγ receptor induction by IFN-γ.