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binding or through a cytotoxic T-cell. The cytotoxic T-cell can attach itself to a membrane, facilitating the release of granzyme B. Granzyme B perforates the target cell membrane and in turn allows the release of perforin. Finally, perforin creates a pore in the membrane, and releases the caspases which leads to the activation of caspase 3. This initiator caspase may cause the cleaving of inactive caspase 3, causing it to become cleaved caspase 3. This is the final molecule needed to trigger cell death.

Intrinsic pathway

The

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