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RNA endonuclease, cap-snatching, arenavirus family This model describes a shared signature region from an RNA endonuclease region associated with cap-snatching for mRNA production by RNA viruses. This domain usually is part of a multifunctional protein, the L protein responsible for RNA-dependent RNA polymerase activity. Cap-snatching is a viral alternative to synthesizing a eukaryotic-like mRNA cap itself.
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