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9:04 PM | February 09, 2013
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Petal Power By Tessa Quax and David Prangishvili, Institut Pasteur The archaeal virus SIRV2 employs an unusual means of escaping from its host. A 7-faced pyramidal structure is formed on the host cell surface from virus-encoded 10kDa protein and opens like the petals on a flower (shown on the image) to release mature virus particles. Image: Colored negative contrast electron micrograph of an isolated 7-faced pyramidal structure encoded by the virus SIRV2 in open conformation.

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