They are activated by cleavage mediated by activated initiator caspases between the small and large subunits of. Effector caspases have short prodomains and exist as inactive dimers. Apoptosis Pathways Nerve growth factor trophic factor. . Caspases are expressed as inactive precursors inside cells and must be activated to cleave specific target substrates. The intersubunit linker also connects two active site loops that. Initiator caspases are those that initiate apoptosis while executioner caspases carry out the protein breakdown known as proteolysis. View the full answer. Caspases a unique family of cysteine proteases execute programmed cell death apoptosis. Caspases exist as inactive zymogens in cells and undergo a cascade of catalytic. In addition to the various mechanisms that regulate caspases during apoptosis many studies have shown that active caspases play important roles in nonapoptotic cellular ...
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