To observe the in vitro expression and subcellular localization of recombinant eukaryotic expression plasmid pEGFP-C1/ SJCHGC in COS-7 cells and analyze the antigenicity of the products expressed.

• 观察差异表达SJCHGC蛋白重组真核表达质粒pEGFP-C1/SJCHGC在COS-7细胞中的表达和亚细胞定位；并分析其表达产物的抗原性.