RÉSUMÉ
<p><b>OBJECTIVE</b>To achieve high expression of human renal cell carcinoma-associated antigen G250 in Escherichia coli.</p><p><b>METHODS</b>The gene fragments encoding the protein obtained by PCR was cloned into prokaryotic expression vector pET32a(+) and expressed in E. coli Rosseta. The immunogenicity of the recombinant protein was evaluated by Western blotting.</p><p><b>RESULTS</b>The plasmid pET32a(+)/G250 was constructed and expressed in E. coli Rosseta successfully. Western blot analysis showed that the recombinant protein could be specifically recognized by monoclonal antibody M75.</p><p><b>CONCLUSION</b>Efficient G250 expression is achieved in prokaryotic expression system, which may facilitate further functional study of the protein and its monoclonal antibody preparation.</p>