目的 构建 Ach R特异性 Ts F c DNA文库并对该文库进行筛选。方法 从建立的分泌 Ach R- Ts F的特异性 Ts细胞系中直接提取了 Ts F Poly A+ m RNA,反转录合成全长 c DNA,以脱磷酸化的λgt11Eco RI臂为载体 ,体外包装成噬菌体颗粒并转染...目的 构建 Ach R特异性 Ts F c DNA文库并对该文库进行筛选。方法 从建立的分泌 Ach R- Ts F的特异性 Ts细胞系中直接提取了 Ts F Poly A+ m RNA,反转录合成全长 c DNA,以脱磷酸化的λgt11Eco RI臂为载体 ,体外包装成噬菌体颗粒并转染 E.coli Y 10 90 hsd R,得到 c DNA文库 ,并用 TCR-α单克隆抗体膜上免疫印迹法对该文库进行筛选。结果 重组噬菌体的滴度约为 1.4× 10 7pfu/ m l,阳性重组率为 86 .9% ,重组噬菌体 DNA的酶切电泳分析证实插入片段大小在 0 .8～ 4 .0 kb之间。初步筛到 2 7个阳性重组噬菌体 ,其插入片段大小约为 1kb左右。结论 该文库的建立有望获得持续高效表达 Ach R特异性 Ts展开更多
Objective To identify genes that involved in spermatogenesis. Methods In order to screen the testis-specific genes, testes cDNA samples from BALB/c mice of different postnatal days （days 4, 9, 18, 35, 54 and 6 months...Objective To identify genes that involved in spermatogenesis. Methods In order to screen the testis-specific genes, testes cDNA samples from BALB/c mice of different postnatal days （days 4, 9, 18, 35, 54 and 6 months） were performed with mouse whole genome Affymetrix chip. The characteristics of the selected gene were analyzed by various bioinformatic tools. The expression profile of the selected gene was identified by RT-PCR. Results By analyzing the hybridization signals, a gene with a differential expression in the developmental stages of testis was identified. This gene was designated as TSF22. The full length cDNA of 1 597 bp contained an open reading frame of 570 bp which encoded a putative protein of 190 amino acids and a molecular weight of 22.106 kD. RT-PCR analysis revealed that TSF22 mRNA was exclusively expressed in mice testis. Conclusions TSF22, functions as a testis-specific transcription factor, may play important roles during spermatogenesis.展开更多
基金This study was supported by grants from Chinese Natural Science Funds(No.30471728,No.30500543)Natural Science Funds of Guangdong Province(No.04007303)
文摘Objective To identify genes that involved in spermatogenesis. Methods In order to screen the testis-specific genes, testes cDNA samples from BALB/c mice of different postnatal days （days 4, 9, 18, 35, 54 and 6 months） were performed with mouse whole genome Affymetrix chip. The characteristics of the selected gene were analyzed by various bioinformatic tools. The expression profile of the selected gene was identified by RT-PCR. Results By analyzing the hybridization signals, a gene with a differential expression in the developmental stages of testis was identified. This gene was designated as TSF22. The full length cDNA of 1 597 bp contained an open reading frame of 570 bp which encoded a putative protein of 190 amino acids and a molecular weight of 22.106 kD. RT-PCR analysis revealed that TSF22 mRNA was exclusively expressed in mice testis. Conclusions TSF22, functions as a testis-specific transcription factor, may play important roles during spermatogenesis.
