Figure 5: Inhibitory activity of cysteine protease inhibitors of Securidaca longepedunculata on P. berghei cysteine proteases. Values are means ± SD (n = 3), IC50 = Concentration of CPI that produced 50% inhibition of P. berghei cysteine protease enzyme activity, Pbcpr = Plasmodium berghei cysteine proteases.