Cytochalasin A is a cell-permeable fungal toxin and is an oxidized derivative of cytochalasin B. Cytochalasin A is an inhibitor of HIV-1 protease (IC50 = 3 μM), inhibits actin polymerization and interferes with microtubule assembly by reacting with sulfhy
Streptolysin O causes both lysis of cells and cardiotoxicity. Streptolysin O is widely used for the controlled permeabilization of cell membranes. Streptolysin O exists in two forms, a reduced active state and an oxidized reversibly inactive state .
Friedelinol is a pentacyclic trierpene plant as the free acid or the aglycone for many saponins. Friedelinol can rearrange to the isomer, ursolic acid, or be oxidized to taraxasterol and amyrin.