How do infections and toxins launch a cell's self-destruct and alarm system?

Cells are coded with several programs for self-destruction. Many cells die peacefully. Others cause a ruckus on their way out.

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<p><a href="http://www.physorg.com/news124388471.html">How do infections and toxins launch a cell's self-destruct and alarm system?</a></p> <p>Cells are coded with several programs for self-destruction. Many cells die peacefully. Others cause a ruckus on their way out.</p>