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抗HEV中和抗体13D8的单链抗体的构建及表达
Authors
夏宁邵
张军
+5 more
朱子恒
李利峰
王颖彬
罗文新
顾颖
Publication date
30 October 2004
Publisher
Abstract
目的 :降低HEV中和性单抗 (mAb) 13D8的鼠源性 ,表达其单链抗体 (scFv)。方法 :从分泌 13D8鼠mAb的杂交瘤细胞中 ,通过RT PCR克隆mAb的VL、VH 基因 ,并进一步组装成VH linker VL 型的scFv片段。将scFv片段克隆到pTO T7载体中 ,在大肠杆菌中进行表达。用ELISA、Westernblot检测scFv的活性。结果 :SDS PAGE表明 ,13D8的scFv在E .coli中得到高效表达 ,表达量达菌体总蛋白的 2 6 .8%左右 ,表达产物主要以包涵体的形式存在。间接ELISA和Westernblot检测表明 ,表达的 13D8的scFv能与HEVOFR2区中一段重组蛋白(NE2 )特异结合。竞争ELISA表明 ,scFv与原鼠mAb识别的为同一表位。结论 :成功地表达出具有免疫学活性的 13D8的scFv
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Last time updated on 16/06/2016