The cell's power pack--the mitochondrion--is more like a bacteria than like us in its protein synthesis, DNA synthesis and its membrane. Chemotherapy is toxic to them, and they blow up. Mitochondria are uniquely sensitive since their DNA doesn't repair and needs every single bit of it to be in working order or it blows up. Cancer cells use more energy, their mitochondria are likely more sensitive than non cancer cells. Known genetic defects and mitochondrial poisons produce toxicity that looks like chemotherapy toxicity. Furthermore, when we've looked, we've found these mitochondrial toxins work on cancer. Why not look at all of them especially dinitrophenol which has been used in people and is a mitochondrial toxin in a way that other chemotherapy is not. It's likely to be a new (toxic) cure for cancer.