Alignment of amino acid sequences of the PKR-binding region and ISDR of recombinant and putative parental-like strains. Strains are indicated by accession number in the left side of the figure. Identity to strain recombinant strain AY378694 in putative parental-like strains AY378615 and AY 378641 is shown by a dash. PKR-binding region and ISDR sequences are shown in bold. Recombination break-point is indicated by an arrow. Amino acids known to be present in interferon resistant viruses are indicated in red in recombinant strain AY378694 (see refs. [31, 35]).