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机译:
Nanjing Agr Univ, Coll Vet Med, 1 Weigang, Nanjing 210095, Jiangsu, Peoples R China;
Chinese Acad Agr Sci, Shanghai Vet Res Inst, 518 Ziyue Rd, Shanghai, Peoples R China;
protein expression; enzyme activity; immune evasion; gene knockout;