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For the PCV2b/rBDH strain, a shift from TTA to CTT in the genomic sequence resulted in a stop codon mutation (from UAA to AAG) in ORF2 (in the antisense chain of the genomic sequence of PCV2), giving an ORF2 gene of 705 nt with another stop codon, compared with the classical PCV2a and PCV2b genotypes.
