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RSV has a different tendency to use the prime-and-realign mechanism in transcribing genomic and antigenomic RNAs. Thirty to 32 cDNA clones of the mRNAs transcribed from virion-sense (NSVc2, NP, and NSVc4) or complementary-sense template RNAs (NS2, NS3, and NCP) of RSV were obtained. The sequences of the cDNA clones were classified into different types according to the criteria shown in Fig. 1C, and the percentages of each type for each mRNA are shown in the stacked graphs.
