Caspase 3 is a heterotetramer of two heterodimers arranged in anti-parallel orientation. Caspase 3 activates caspases 6 and 7 and this sequential activation leads to apoptosis. CASP3 is a protein which is a member of the cysteine-aspartic acid protease (caspase) family. Caspase 3 participates in cleavage of Amyloid beta 4A precursor protein which is implicated with neuronal death Alzheimer's disease. Caspase 3 in turn is processed by caspases 8, 9 and 10.