目的：克隆并表达艰难梭菌毒素A羧基末端受体结合区基因。
AIM: to obtain the high expression of the gene coding for clostridium difficile toxin a receptor binding zone.
结果：克隆的基因序列符合小鼠轻、重链可变区基因的特征；
RESULTS: The VH and VL genes were homologous with the published gene sequences of mouse antibody variable region.
目的：获得抗人视网膜母细胞瘤单克隆抗体轻链可变区基因。
Objective: to acquire the variable region gene of light chain of monoclonal antibody against human retinoblastoma.
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