Analyses of the 5' ends of snowshoe hare bunyavirus plus sense S RNA species (including mRNA) recovered from infected cells have revealed two types of termini. These include ends that are essentially exact copies of the 3' end of the viral S RNA and others that are similar, but additionally have 13-14 nucleotide extensions that are heterogeneous in sequence. The former probably represent replicative plus sense RNA species, the latter mRNA species that have host cell derived primer sequences.
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