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Practice question

Question

Initiator caspases are activated primarily by

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Explanation

Initiator caspases (caspase-8, -9 and -10) are activated by dimerization within large multiprotein platforms such as the DISC or the apoptosome. Once active they cleave and thereby activate the executioner caspases (caspase-3, -6 and -7). Executioner caspases proteolytically dismantle structural proteins, activate nucleases and ultimately produce the morphological hallmarks of apoptosis.