摘要
ＣｌｏｎｉｎｇａｎｄｅｘｐｒｅｓｓｉｏｎｏｆＮＳ３ｃＤＮＡｆｒａｇｍｅｎｔｏｆＨＣＶｇｅｎｏｍｅｏｆＨｅｂｅｉｉｓｏｌａｔｅｉｎＥ．ｃｏｌｉＺＨＵＦｅｎＬｕ，ＬＵＨａｏＹｉｎｇ，ＬＩＺｈｕｏａｎｄＱＩＺｈｏｎｇＴｉａｎＳｕｂｊｅｃｔｈｅａｄｉｎ...
AIM To obtain greater antigenicity of HCV NS3 protein. METHODS The HCV NS3 cDNA fragment was amplified by reverse transcription polymerase chain reaction from the sera of the HCV infected patients. The DNA sequence was determined by dideoxy mediated chain termination method using T7 polymerase. HCV NS3 protein was expressed in E. coli . RESULTS Sequence analysis indicated that the HCV isolate of this study belongs to HCV Ⅱ; SDS PAGE demonstrated an M r 23800 and an M r 22000 recombinant protein band which amount to 14% and 11% of the total bacterial proteins separately. Western blotting and ELISA showed NS3 protein possessed greater antigenicity. CONCLUSION Recombinant HCV NS3 protein was expressed successfully, which provided the basis for developing HCV diagnostic reagents.
