ORF6 gene homology with the North American and European strains were the highest, followed by the ORF2 gene, is again ORF7, ORF4 and ORF5 gene, the lowest was ORF3 gene.

OR F 6基因与北美洲株同源性和欧洲株同源性均最高，其次是ORF 2基因，再次是OR F 7、ORF4和ORF 5基因，同源性最低的是ORF 3基因。

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ORF6 gene homology with the North American and European strains were the highest, followed by the ORF2 gene, is again ORF7, ORF4 and ORF5 gene, the lowest was ORF3 gene.

OR F 6基因与北美洲株同源性和欧洲株同源性均最高，其次是ORF 2基因，再次是OR F 7、ORF4和ORF 5基因，同源性最低的是ORF 3基因。

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