镍离子亲和层析纯化重组类人胶原蛋白
首发时间:2012-11-16
摘要:以Ni Sepharose Fast Flow为层析介质,分别采用了咪唑洗脱和降低pH洗脱方式对重组类人胶原蛋白进行纯化,分别收集洗脱部分,SDS-PAGE 检测蛋白纯度。结果表明以含20 mM sodium phosphate,0.5 M NaCl(pH 4)的洗脱缓冲液进行降低PH洗脱方法所得蛋白纯度和收率最好,所得蛋白纯度达99%以上,收率为76%。纯化的重组类人胶原蛋白为电泳纯,分子量为97 kb。
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The Purification of Recombinant Human -like Collagen By Ni(II)-based Immobilized Metal Ion Affinity Chromatography
Abstract:In this paper, the recombinant human -like collagen (HLC) was purified by Ni(II)-based immobilized metal ion affinity chromatography with Ni Sepharose Fast Flow as the affinity medium. The column which had absorbed the recombinant HLC was eluted by lower pH elution and imidazole gradient elution respectively. Various fractions of elute were collected, then identified for protein purity by SDS-PAGE. The results show that the purity and the recovery of the recombinant HLC is the best by the lower PH elution with the buffer (20 mM sodium phosphate, 0.5 M NaCl, pH 4).The purity was more than 99%, and the recovery was 76%. The obtained recombinant HLC, with a relative molecular weight of 97 kD, was electrophoretically pure.
Keywords: Immobilized Metal Ion Affinity Recombinant Human-like Collagen Purification
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