利用 1株鹅源腺病毒 Y81G4 株 ,经鹅胚增殖后收获尿囊液 ,用差速离心法纯化病毒子并提取病毒基因组 DNA.病毒 DNA经 H ind 酶切后共产生 1 0个片段 ,分别回收各酶切片段 ,与经 H ind 单酶切的p UC1 8连接 ,获得 8个不同的重组质粒 .对...利用 1株鹅源腺病毒 Y81G4 株 ,经鹅胚增殖后收获尿囊液 ,用差速离心法纯化病毒子并提取病毒基因组 DNA.病毒 DNA经 H ind 酶切后共产生 1 0个片段 ,分别回收各酶切片段 ,与经 H ind 单酶切的p UC1 8连接 ,获得 8个不同的重组质粒 .对于未克隆到的两末端片段 ,经碱处理去除末端蛋白后 ,以平端和 H ind 粘端与经 Sma 和 H ind 双酶切的 p UC1 8连接 ,获得了重组质粒 p GAHC和 p GAHI.克隆的各酶切片段 ,通过酶切电泳和 Southern blotting结果鉴定 ,证明已分别克隆到该病毒基因组 DNA H ind 酶切片段 ,且各酶切片段大小之和约为 3 2 .展开更多
A genomic library derived from leaves of spinach was constructed with the λGem11_BamHI Arms as the vector. The library was screened using the BADH cDNA of mountain spinach as a probe and six positive clones were obta...A genomic library derived from leaves of spinach was constructed with the λGem11_BamHI Arms as the vector. The library was screened using the BADH cDNA of mountain spinach as a probe and six positive clones were obtained through three rounds of screening. One of the positive clones named D, which was hybridized with the 5′600 bp fragment of mountain spinach BADH cDNA, was selected and further analyzed. The size of the insert in clone D was about 12 kb. 8 856 nucleotides of the insert were sequenced which contained 2 459 nucleotides of 5′ noncoding region, 6 111 nucleotides of the complete sequence of the BADH gene, and 286 nucleotides of a 3′ noncoding region. The result of sequence analysis indicated that the BADH gene contained 14 introns and the junction sequences at splicing sites followed the GT_AG rule basically.展开更多
A 6.5-kb specific fragment containing the T7 promoter and the transcription vector was excised from the full-length cDNA clone of the Newcastle disease virus(NDV)strain ZJI of goose origin,and thereafter it was self-l...A 6.5-kb specific fragment containing the T7 promoter and the transcription vector was excised from the full-length cDNA clone of the Newcastle disease virus(NDV)strain ZJI of goose origin,and thereafter it was self-ligated to form a high quality plasmid for mutagenesis.Site-directed mutagenesis was used for inserting three additional G nucleotides(nts)into the region between the T7 promoter and the leader sequence of the NDV genome.RT-PCR was employed to amplify the F/HN gene fragments,and then they were ligated by the shared restriction enzyme BsmBI.Finally,the corresponding fragment in the mutant full-length cDNA was substituted with the new one.The sequencing results showed that the three additional G nts were successfully inserted and the mutant nts in the full-length cDNA were corrected.This study lays a good foundation for research on the reverse genetics of NDV strain ZJI.展开更多
目的分离犬MC2R基因cDNA5′末端,分析其启动区域特点。方法采用了RNA连接酶介导的RACE(RLM-RACE)技术分离了犬MC2R基因和局部序列比对工具(Basic Local Alignment Search Tool,BLAST)对CDS区进行了初步验证。结果新分离了犬MC2RcDNA的5...目的分离犬MC2R基因cDNA5′末端,分析其启动区域特点。方法采用了RNA连接酶介导的RACE(RLM-RACE)技术分离了犬MC2R基因和局部序列比对工具(Basic Local Alignment Search Tool,BLAST)对CDS区进行了初步验证。结果新分离了犬MC2RcDNA的5′末端,并对其启动区序列作了初步分析。序列分析显示,该基因至少由两个外显子(exon1和exon2)组成,exon1和exon2的一部分编码5′非翻译区(5′-UTR),exon2其余的部分编码整个编码区。结论克隆了犬MC2R基因的5′末端,在其启动区发现了inr、SF-1、SP1、CRE、PPRE、AP-1等多个顺式作用元件,为犬MC2R表达调控研究奠定基础。展开更多
文摘利用 1株鹅源腺病毒 Y81G4 株 ,经鹅胚增殖后收获尿囊液 ,用差速离心法纯化病毒子并提取病毒基因组 DNA.病毒 DNA经 H ind 酶切后共产生 1 0个片段 ,分别回收各酶切片段 ,与经 H ind 单酶切的p UC1 8连接 ,获得 8个不同的重组质粒 .对于未克隆到的两末端片段 ,经碱处理去除末端蛋白后 ,以平端和 H ind 粘端与经 Sma 和 H ind 双酶切的 p UC1 8连接 ,获得了重组质粒 p GAHC和 p GAHI.克隆的各酶切片段 ,通过酶切电泳和 Southern blotting结果鉴定 ,证明已分别克隆到该病毒基因组 DNA H ind 酶切片段 ,且各酶切片段大小之和约为 3 2 .
文摘A genomic library derived from leaves of spinach was constructed with the λGem11_BamHI Arms as the vector. The library was screened using the BADH cDNA of mountain spinach as a probe and six positive clones were obtained through three rounds of screening. One of the positive clones named D, which was hybridized with the 5′600 bp fragment of mountain spinach BADH cDNA, was selected and further analyzed. The size of the insert in clone D was about 12 kb. 8 856 nucleotides of the insert were sequenced which contained 2 459 nucleotides of 5′ noncoding region, 6 111 nucleotides of the complete sequence of the BADH gene, and 286 nucleotides of a 3′ noncoding region. The result of sequence analysis indicated that the BADH gene contained 14 introns and the junction sequences at splicing sites followed the GT_AG rule basically.
基金This work was supported by the National Natural Science Foundation of China(No.39893290).
文摘A 6.5-kb specific fragment containing the T7 promoter and the transcription vector was excised from the full-length cDNA clone of the Newcastle disease virus(NDV)strain ZJI of goose origin,and thereafter it was self-ligated to form a high quality plasmid for mutagenesis.Site-directed mutagenesis was used for inserting three additional G nucleotides(nts)into the region between the T7 promoter and the leader sequence of the NDV genome.RT-PCR was employed to amplify the F/HN gene fragments,and then they were ligated by the shared restriction enzyme BsmBI.Finally,the corresponding fragment in the mutant full-length cDNA was substituted with the new one.The sequencing results showed that the three additional G nts were successfully inserted and the mutant nts in the full-length cDNA were corrected.This study lays a good foundation for research on the reverse genetics of NDV strain ZJI.
文摘目的分离犬MC2R基因cDNA5′末端,分析其启动区域特点。方法采用了RNA连接酶介导的RACE(RLM-RACE)技术分离了犬MC2R基因和局部序列比对工具(Basic Local Alignment Search Tool,BLAST)对CDS区进行了初步验证。结果新分离了犬MC2RcDNA的5′末端,并对其启动区序列作了初步分析。序列分析显示,该基因至少由两个外显子(exon1和exon2)组成,exon1和exon2的一部分编码5′非翻译区(5′-UTR),exon2其余的部分编码整个编码区。结论克隆了犬MC2R基因的5′末端,在其启动区发现了inr、SF-1、SP1、CRE、PPRE、AP-1等多个顺式作用元件,为犬MC2R表达调控研究奠定基础。
