FIG 3.

(A) The organization of the 3′ parts of chicken/B21-CHV/2012/HUN (B21, GenBank accession no. KF961186), chicken/CHK-IV-CHV/2013/HUN (CHK-IV, GenBank accession no. KF961187), turkey/B407-THV/2011/HUN (B407, GenBank accession no. KF961188), and pigeon mesiviruses (PiMEVs: GenBank accession no. KC876003 and KC811837). The presumed initiation codons in a weak Kozak context (optimal nucleotides are underlined) of ORF2 are shown in italics after the STOP codon (black star) of the end of the viral polyprotein (3D). Nucleotide (upper numbers) and amino acid (lower numbers) lengths of the presumed ORF2 are indicated in each gene box. Dotted lines corresponding to PiMEVs indicate the deletion of ORF2 region. The identified repeating elements of “unit A” and “unit B” (“B”) together with the location of AUG-rich genome parts are depicted within the gray and white arrows. The pairwise nucleotide (and amino acid) sequence identities between the different regions (indicated by double arrows) of 3′ genome parts are also illustrated. (B) Alignments of the “unit A” and “unit B” sequences of the study strains (B21; CHK-IV and B407), pigeon mesiviruses (PiMEV-1 and -2), and the members of genus Megrivirus (0091.1, 2993D, CHK148, and TRK22). Similar nucleotides are shaded. Asterisks indicate identical nucleotides.