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大肠杆菌

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Objective To clone the BP26 gene of B. abortus, highly express in K. coli and purify the expressed product. Methods Extract the genomic DNA of B.

目的 克隆布鲁氏菌BP26基因,并在大肠杆菌中高效表达及纯化BP26蛋白。

In order to cluone, seauence and express the outer membrane protein 25 (Omp25) gene sequence of wapiti's Brucella abortus strain ML.

目的 克隆马鹿布氏杆菌ML分离株25kDa外膜蛋白(Omp25)基因,并在大肠杆菌中表达。

The Omp25 gene of wapiti's Brucella abortus was amplified by RT-PCR and sequenced, Then the interesting gene was subcloned into pET28a for expression. The results showed that the full length of Omp25 gene was 642bp, which encoded 213 amino acids.

运用RT-PCR技术从马鹿布氏杆菌分离株中扩增出Omp25基因,将其克隆入pMD18-T中进行核苷酸序列测定和遗传变异分析,并将目的基因亚克隆到大肠杆菌表达载体pET28a中诱导表达。

Abortus, amplify BP26 gene by PCR and clone to pMD18-T simple vector. Identify the constructed recombinant plasmid pMDBP26 by sequencing, then subclone to vector pET-28a. Transform the constructed recombinant plasmid pETBP26 to E. coli BL21(DE3) for expression under induction of IPTG. Purify the expressed product by histidine-binding resin column chromatography and identify by Western blot.

提取布鲁氏菌基因组DNA,用PCR扩增出BP26基因,并克隆到pMD18-T载体上,测序正确后,再亚克隆至pET-28a载体上,转化到大肠杆菌BL21(DE3)中,用IPTG诱导表达,经组氨酸结合树脂柱纯化,并对纯化后的表达产物进行Western blot鉴定。

ThemostpotentofthesetoxinsThe coding sequence of abrin a A chain gene was obtained by RT PCR and cloned into the expression vector pET28b.

成熟的ABRaA在大肠杆菌中得到高效表达,可溶性重组蛋白质的获得率达 4mg/L培养物,而且具有较好的纯度。

The real-time PCR results show that 10 isolates were amplified while 54 isolates did not produce considerable amplification. So that , the 10 isolates were identified as E coli O157 and the 54 isolates were non- E coli O157, which comply with the results of serotyping.

说明出现扩增曲线的10株细菌是大肠杆菌0157,未出现指数扩增的54株细菌是非0157大肠杆菌,荧光定量PCR法和血清学检测结果完全一致。

In addition, we compared the codon preferences among poplar, Arabidopsis thaliana, Oryza sative, Homo sapi- ens and Escherichia coli, and poplar was found to be most similar to A.thaliana and least similar to E.coli.

将杨树的密码子使用频率与拟南芥、水稻、大肠杆菌和人等不同模式生物种比较后发现,杨树密码子的偏爱性与同为双子叶植物的拟南芥最为相似,与人和大肠杆菌之间的差异较大。

The nattokinase gene was cloned into a prokaryon expression vector pET28a to construct a recombinant plasmid pETNK.

把纳豆激酶基因克隆到大肠杆菌表达载体pET28a~+的BamHI和XhoI位点上,并在大肠杆菌BL21(DE3)中成功表达了纳豆激酶基因。

Result A strain of Pseudomonas cepacia was detected in 1.6% compound quaternary ammonium disinfectant before application. The amount of the germ was 1.21×105cfu/ml. The strain had the similar resistance to chlorine-containing disinfectants and glutaraldehyde compared with Staphy aureus. The contaminated disinfectant could still thoroughly destroy the antigenicity of HBsAg with 60min's contact after diluted for 5-20 times.

结果 该洋葱假单胞菌对氯和戊二醛的抗力与大肠杆菌和金黄色葡萄球菌接近,污染样液除菌后1 000倍稀释对大肠杆菌和金黄色葡萄球菌仍有较好的杀菌效果,20倍稀释可完全破坏HBsAg抗原性,和抑制枯草杆菌黑色变种芽胞的生长,1 600倍稀释可抑制白色念珠菌生长,而原液则不能抑制分离菌株的生长。

Transforming DNA uptake gene orthologs do not mediate spontaneous plasmid transformation in Escherichia coli. J Bacteriol.

近年来研究表明肠道中大量存在的大肠杆菌具备自然转化能力,因此转基因食品中的基因有可能通过大肠杆菌进入人体肠道细胞。

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每逢看到沃林顿那刚毅的脸,那乌黑、忧郁的眼睛,她便会相信,他一定作过不幸的爱情的受害者。

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