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Putative secondary structures of the 3′ 80-nt regions of genome RNA for the WT (Leader), GP24, FP30, GP33, GP42, GP48, and TrTr (GP55) viruses and the intact trailer region. Nucleotides positioned at 56 to 80 are shown as closed circles, and those of the intact 55-nt leader sequence are shown as open circles. Nucleotides derived from the trailer sequence are shown as gray circles.
