基因的

The transcriptional regulation of APP gene in neuronal cells may be important both as a model system for the analysis of transcriptional regulation of eukaryotic gene in neuron and playing the putatively central role of APP in the pathogenesis of the AD.

研究APP基因的转录调节，不仅可为真核基因在神经元中的表达调控提供一种模式，而且还可以进一步探讨其在AD病理学机制中的作用。

MethodsThe D. bacteria - E. coli shuttle expression vector pZT17 was constructed based on plasmids of pUE30, pGBM5 and pKatCAT. Then pZT17 with lux+ from Photinus pyralis was used to transform into D. grandis and E.coli. The recombinant strains were induced separately.

以质粒pUE30、pGBM5及pKatCAT为基础，构建抗辐射菌属一大肠杆菌间的穿梭载体，将groEL启动子和荧光素酶基因lux+插入到构建的穿梭载体中得到穿梭表达载体，并将该载体转化大肠杆菌诱导荧光素酶基因的表达。

RT-PCR showed that the opening reading frame of the rab gene was 663 bp long.

通过RT-PCR，从mRNA获得的该基因的开放读框为663 bp，表明该基因在转录过程中有内含子的删除。

All the transfected and un-transfected rMSCs were attached to Allo-DBMs. These new biomaterials were implanted in muscle bags and segmental radius defects of the New Zealand white rabbits, and some controlled material groups were established for comparison. All the biomaterials and the controlled materials were assessed by gross observation, radiographical and histological methods.

取兔自体骨髓基质细胞培养扩增，用脂质体介导的方法转染人骨发生蛋白2基因，将转染和未转染人骨发生蛋白2基因的自体骨髓基质细胞附和于异体兔脱钙骨基质形成新的生物植骨材料，连同空白及单纯脱钙骨基质对照组植入兔前肢肌袋和桡骨缺损。2、4、6、8周分别取材进行大体，放射线和病理观察。

In this manner, the replicative senescence is avoided due to the rapid cleavage rate of the cell line.

其中，H1299缺少了老化常有过度表现的p53基因，在此也可探讨p53基因的有无，是否对细胞的老化造成影响。

In order to study species resource from ruminal fluid, one strain of methionine-degrading bacterium MB6-1 was isolated and purified. 16 S rRNA encoding gene (16 S rDN4) from MB6-1 was amplified by PCR, and its nucleotide sequence was determined.

为分析研究山羊瘤胃液中甲硫氨酸降解菌群的物种资源，对经分离纯化获得的一株甲硫氨酸降解菌MB6-1，采用PCR方法扩增其16 S rDNA基因，并测定其基因的核苷酸全序列。

In order to study species resource from ruminal fluid, one strain of methionine- degrading bacterium MB6-1 was isolated and purified. 16 S rRNA encoding gene (16 S rDNA) from MB6-1 was amplified by PCR, and its nucleotide sequence was determined.

摘 要：为研究山羊瘤胃液中甲硫氨酸降解菌群的物种资源，对经分离纯化获得的一株甲硫氨酸降解菌MB6-1，采用PCR方法扩增其16 S rDNA基因，并测定其基因的核苷酸全序列。

AIM: To highlight tissue distribution of attenuated salmonellae carrying hepatocyte growth factor genes in murine gastric ulcers and thereby to provide a basis for HGF application in gene therapy for gastric ulcers.

摘要目的：阐明携带肝细胞生长因子基因的减毒沙门氏菌在大鼠胃溃疡治疗中的组织分布规律，为HGF在胃溃疡基因治疗中的实际应用提供依据。

They found that mice result without the GRDRG scragged GRPR gene scratched much lease less than normal mice with the gene.

他们发现没有GRPR基因的老鼠远没有那些有该基因的老鼠挠的厉害。

Cytoplasmic type, tissuey type and nuclear background had little influence on RNA editing of the two genes, but each factor had its own influence tendency on plant editing frequency of the same or different genes.

胞质类型、组织类型和核背景对两个基因的RNA编辑位点并没有太大影响，但是各因素对植物相同或不同基因的编辑频率表现出各自不同的影响趋势。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。