中文摘要：

目的应用TA克隆技术构建含中国人常见GJB2基因突变片段的载体，为构建突变绿色荧光蛋白融合载体提供基础。方法首先利用定点诱变法在体外构建235delC．299-300delAT和176del16bp绿色荧光蛋白非融合载体，以此为模板利用PCR扩增突变基因片段，然后将PCR扩增产物克隆到TA载体上，用限制性内切酶法和测序法鉴定重组质粒序列正确性。结果用限制性内切酶法和测序方法证实扩增片段为目的片段。结论成功地构建了235delC、299-300delAT和176del16bp突变基因片段TA克隆载体，为构建突变绿色荧光蛋白融合载体、进一步研究突变致聋机制奠定了基础。

英文摘要：

Objective To construct vectors of common GJB2 gene mutations in the Chinese population with the TA cloning technique, and to provide mutant DNA for making EGFP（enhanced green fluorescent protein） fusion protein vectors. Methods Non-fusion protein vectors of 235delC, 299-300delAT and 176del16bp were first made by site-directed mutagenesis in vitro. Then the three mutant gene fragments were amplified by PCR. The PCR products were cloned into TA cloning vectors. The restriction enzyme and sequencing were used to verify the validity of the mutations. Results The TA cloning vectors were identified to have 235delC, 299-300delAT and 176del16bp by restriction enzyme analysis and sequencing. Conclusion The TA cloning vectors with common GJB2 gene mutations in the Chinese population were constructed successfully, and this can be used for the construction of EGFP fusion protein vectors and further research on the mechanism of non-syndromic hearing loss.