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There is an urgent need to develop new vaccines against highly pathogenic PRRS virus (HP-PRRSV) variant in China. The actual use of each codon pairs is more or less frequent than that of the statistical prediction and codon pair bias (CPB) usage affects gene translation. We “shuffled” the existing codons in HP-PRRSV genes GP5, M, nsp2 and nsp9, so that the CPB of these genes could be more negative...
Transcription regulatory sequences (TRSs) play a key role in the synthesis of porcine reproductive and respiratory syndrome virus (PRRSV) subgenomic mRNAs, which resembles similarity-assisted RNA recombination. In this study, genome instability was found when a highly pathogenic PRRSV (HP-PRRSV) strain was inserted by an additional transcription unit in which a foreign gene GFP was expressed from...
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