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Access to the article is free, however registration and sign-in are required: Bacteria produce an arsenal of sophisticated toxins that disrupt the normal processes of the host cell, usually by modifying or inactivating host cell proteins. Now, as Coburn and Leong discuss in their Perspective, members of the cytolethal distending toxin (CDT) family have been identified as enzymes that attack DNA (and not protein) within the host cell (Lara-Tejero and GalÃ¡n). By attacking DNA, perhaps during chromosomal replication, CDTs cause the host cell to halt in G2 phase of the cell cycle.
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