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The enterovirus 5' nontranslated region (NTR) contains an internal ribosome entry site (IRES), which facilitates translation initiation of the viral open reading frame in a 5' (m(7)GpppN) cap-independent manner, and cis-acting signals for positive-strand RNA replication. For several enteroviruses, the 5' NTR has been shown to determine the virulence(More)
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