发明申请
US20090004221A1 Mutant Porcine Reproductive and Respiratory Syndrome Virus 有权
突变型猪繁殖与呼吸综合征病毒

Mutant Porcine Reproductive and Respiratory Syndrome Virus
摘要:
The present invention provides a genetically modified PRRS virus which has been modified such that the conserved cysteine in the E protein has been deleted or changed to a non-cysteine residue and polynucleotides that encode it. Vaccines comprising the genetically modified virus and polynucleotides are also provided.
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