id author title date pages extension mime words sentences flesch summary cache txt cord-265508-t1nfyzf5 Boursnell, M.E.G. Sequencing of coronavirus IBV genomic RNA: a 195-base open reading frame encoded by mRNA B 1984-08-31 .txt text/plain 2130 125 61 authors: Boursnell, M.E.G.; Brown, T.D.K. title: Sequencing of coronavirus IBV genomic RNA: a 195-base open reading frame encoded by mRNA B Abstract DNA sequencing of genomic cDNA clones of avian infectious bronchitis virus (IBV) has been carried out. The organisation of the messenger RNAs and in vitro translation studies have led to the hypothesis that the 5'-most sequences of each mRNA, which are not present in the next smallest mRNA, contain the complete coding sequences for the major protein product produced by that messenger species (Stern and Kennedy, 1980b; Lai et al., 1981) . In this paper we report the nucleotide sequence of a cloned cDNA copy of IBV genomic RNA in the region corresponding to the 5' end of mRNA B. The region of the IBV sequence presented in this paper contains the 5' ends, on the viral genome, of mRNAs A and B. ./cache/cord-265508-t1nfyzf5.txt ./txt/cord-265508-t1nfyzf5.txt