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Reovirus guanylyltransferase, studied as a covalent enzyme-GMP intermediate, was used to guanylate appropriate acceptor molecules in vitro to produce authentic cap structures. Guanylyltransferase activity was associated with lambda 2, the 140-kilodalton product of the L2 gene segment of reovirus serotypes 1 and 3.
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Cleveland et al. (1986) studied this question.
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