结果突变基因重组表达质粒构建正确；
Results The recombinant plasmid with mutant gene was constructed correctly.
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.
目的：克隆大鼠神经营养因子4全长基因，构建真核细胞表达质粒。
AIM: to clone rat neurotrophin-4 (NT-4) total gene and construct expression plasmid for prokaryotic cells.
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