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. Author manuscript; available in PMC: 2010 Feb 1.
Published in final edited form as: Virus Res. 2008 Jul 30;139(2):217–229. doi: 10.1016/j.virusres.2008.06.010

Fig. 4. Phylogenetic distribution of TLSs.

Fig. 4

The occurrence of distinct classes of 3′-termini is shown for selected genera of the three lineages of viruses that have been classified to Supergroup 3 on the basis of their RdRp sequences (based on Koonin and Dolja, 1993). The 3′-termini are indicated as: pA, poly(A) tail; TLS with aminoacyl specificity indicated; hemi-TLS, to indicate an acceptor-T arm not capable of aminoacylation; no indication for viruses whose genomes have none of the above types of termini. Branch lengths are approximate.