目的从人外周血淋巴细胞中克隆出cd 81基因，构建真核表达质粒，并在COS - 7细胞中进行表达。
Aim to clone human CD81 gene from peripheral blood lymphocytes, and construct its eukaryotic expression vector, and then express it in COS-7 cells.
构建小鼠il - 4截短型基因真核表达质粒，表达小鼠il - 4受体拮抗体蛋白。
To clone mouse interleukin 4 (mIL-4) truncated gene, construct its eukaryotic expression plasmid pFB-mIL4 and express the truncated protein (murine IL-4 receptor antagonist).
目的构建癌胚抗原（CEA）与热休克蛋白70（HSP70）的真核双表达质粒，并检测其在体外的表达。
Objective To construct the eukaryotic coexpression plasmid encoding carcinoembryonic antigen(CEA) and heat shock proteins 70 (HSP70), then detect the expression of the plasmid in vitro.
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