Two strategies against fractional killing. (A) Time series simulations of a population of cells that are treated with both cisplatin and a CIAP inhibitor. (B) Inhibition of CIAP changes the time dependent trajectories of an apoptotic cell (red curve) as well as a surviving cell (blue curve). (C) Time series simulations of a population of cells treated with cisplatin and a BCL inhibitor. (D) Inhibition of BCL expanded the area corresponding to apoptosis.