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Access to the article is free, however registration and sign-in are required: It is a mystery how some viruses are able to replicate inside the host cell, producing progeny that escape without damaging the host's plasma membrane. In a Perspective, Joshua Zimmerberg describes new research (Marciano et al.) demonstrating that the f1 phage (a virus that infects bacteria) is able to export new progeny out of the bacterial host using a phage-encoded pIV protein, which forms a gated channel in the bacterial outer membrane. Zimmerberg compares this mechanism of export to that of other viruses and discusses what these new findings teach us about protein translocation in eukaryotic cells.
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