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Nature Reviews Molecular Cell Biology 5, 897–907 (1 November 2004) | doi:10.1038/nrm1496

Molecular mechanisms of caspase regulation during apoptosis

Stefan J. Riedl & Yigong Shi

Caspases, which are the executioners of apoptosis, comprise two distinct classes, the initiators and the effectors. Although general structural features are shared between the initiator and the effector caspases, their activation, inhibition and release of inhibition are differentially regulated. Biochemical and structural studies have led to important advances in understanding the underlying molecular mechanisms of caspase regulation. This article reviews these latest advances and describes our present understanding of caspase regulation during apoptosis.