sentences:  However, the possibility of ribosomal frameshifting has been ruled out since the small ORF site does not contain the characteristic hallmarks, such the 7 nucleotide long “slippery sequence” or downstream pseudoknot that is seen in other members of "Birnaviridae".It is hypothesized the small ORF is translated in a mechanism that uses subgenomic transcripts.In any case, the translation of the small ORF transcript produces a 27-kDa polypeptide.