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重组人尿激酶原在CHO细胞中的高效表达及其纯化

Chinese Journal of Bioprocess Engineering(2012)

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Abstract
用鸡β-globin的MAR序列和人看家基因延伸因子1α(hEF-1α)的调控序列以及旱獭RNA稳定与输出序列,构建了重组人尿激酶原(recombinant human pro-urokinase,rhPro-UK)的高效表达载体,在CHO细胞中获得了rhPro-UK的高效稳定表达,rhPro-UK的表达水平达到1 299 IU(以百万细胞1 d的表达量计)。采用阳离子交换层析、疏水层析和凝胶排阻层析的三步工艺纯化表达rhPro-UK的CHO细胞培养上清液,rhPro-UK的纯度达到98%、回收率为60%~70%。
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Key words
expression,CHO cells,purification,rhupro-UK
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