CASP3 and neoplasm: In the present study we perform a detailed analysis of SapC-DOPS actions in two neuroblastoma cell lines, and reveal that tumor toxicity results from mitochondrial-mediated apoptosis triggered by disrupted ΔΨM, mitochondrial release of Cyto c and Smac, Bax relocation and oligomerization, and activation of Caspase 3.