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Submission + - Bacteria-Killing Viruses Wield an Iron Spike (sciencemag.org)

sciencehabit writes: Scientists have long known that a group of viruses called bacteriophages have a knack for infiltrating bacteria and that some begin their attack with a protein spike. But the tip of this spike is so small that no one knew what it was made of or exactly how it worked. Now a team of researchers has found a single iron atom at the head of the spike, a discovery that suggests phages enter bacteria in a different way than surmised.
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Bacteria-Killing Viruses Wield an Iron Spike

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Quark! Quark! Beware the quantum duck!