Since the important roles of eo protein in the viral infection . immunity and virus - host interaction . the homology of 21 csfv strains was investigated by sequence analysis of eo genes in this study , which will provide some evidence for epidemiological study . in addition , the eo gene of hog cholera lapinized vaccine ( hclv ) strain was expressed in the prokaryotic and eucaryotic systems , and the recombinant proteins were preliminarily analyzed by immunological method 鑒于eo蛋白在病毒感染,誘導機體免疫及與宿主細胞相互關系中的作用,本研究克隆了2株豬瘟病毒eo基因并將其與其它毒株eo基因進行了序列分析,揭示了我國豬瘟病毒流行株之間的遺傳演化關系,為豬瘟病毒的流行病學研究提供依據。