核苷酸

Our results showed that 1, 8-Naphthyl imide could improve the properties of natural oligonucleotide in resisting nuclease and binding the targeted sequence by covalently linkage at the end of oligonucleotide. Moreover, our results also showed that the antigene oligonucleotide could specifically cleave the targeted double DNA sequence by modification of naphthyl imide at the 3'end of oligonucleotide.

体外结果表明萘二酰亚胺对寡核苷酸的共价修饰可以提高天然寡核苷酸抗核酸酶降解能力，提高寡核苷酸与靶序列结合的稳定性以及使寡核苷酸具有选择性结合和切断靶DNA的功能。

Flavoprotein A conjugated protein in which a FLAVIN is the prosthetic group joined to a protein component.

黄素蛋白：一种以黄素核苷酸（黄素腺嘌呤二核苷酸 FAD 或黄素单核苷酸 FMN ）为辅基的结合蛋白。

A method for detecting the presence of a target nucleic acid sequence in a sample, said method comprising subjecting said sample to an amplification reaction using a set of nucleotides, at least one of which is fluorescently labelled, contacting amplification product with a probe under conditions in which the probe will hybridise to said target sequence, said probe comprising a reactive molecule which is able to absorb fluorescence from or donate fluorescent energy to said fluorescent labelled nucleotide and monitoring fluorescence of said sample.

一种用于检测在某样品中是否存在目标核酸序列的方法，该方法包括：使用一套核苷酸对所说的样品进行扩增反应，其中至少一个核苷酸是被荧光标记的，在探针与目标序列杂交的条件下使扩增产物与探针混合，所说的探针包括一种活性分子，该活性分子能够从荧光标记核苷酸吸收荧光或向其贡献荧光能量，及检测样品的荧光。

It also can be used as alternative antigen of newgeneration vaccine.In this experiment,we screen the major protective antigen hsp65 gene of MAP in order to developnew vaccine especially the DNA vaccine for the prevention of paratuberculosis disease.The hsp65 genewas amplified from MAP C-2 chromosomal DNA by using the PCR technique.We gained a hsp65 gene of 1 626bp.Then PCR product was cloned into pGEM-T vector by T-A clone technique and therecombinant clone was identified by plasmid size,enzyme digestion and PCR identification.The cloneplasmid of pGEM-T- hsp65 was successfully constructed.The nucleotide sequence and deduced aminoacid sequence ofclone gene was analyzed by DNASTAR software.The result indicated that the size ofhsp65 gene consist with M.paratuberculosis K-10 strain in GenBank and the sequential homogeneityreached 99.1%,the amino acid homogeneity reached 99.3%.The preceding analysis indicated that thehsp65 gene was very conservative in M.paratuberculosis.

为了研发预防副结核病的新型疫苗尤其是DNA疫苗及相关蛋白功能，本研究选择了MAP的主要保护性抗原Hsp65蛋白，以副结核分枝杆菌C-2株染色体DNA为模板，以hsp65基因的特异性引物进行PCR扩增，获得了1 626bp的hsp65基因，通过T-A克隆技术，将PCR产物克隆至pGEM-T Vector中，以质粒大小、酶切分析、PCR扩增及序列分析鉴定重组克隆，成功地构建出克隆质粒pGEM-T-hsp65，以DNASTAR软件分析了所克隆基因的核苷酸序列和推导的氨基酸序列，结果表明，所获得的hsp65基因与GenBank中MAPK-10株该基因核苷酸大小完全一致，两者核苷酸序列的同源性为99.1％，氨基酸序列的同源性为99.3％，表明该基因在副结核分枝杆菌中高度保守。

In order to overcome the problem of multidrug resistance in human epidemic carcinomata anti-adriamycin cells (KB-A-1), the antisense and antigene oligonucleotides were used to investigate their effectiveness on inhibiting the mdr1 gene expression. The effectiveness of antisense or antigene oligonucleotide on inhibiting the multidrug resistance was detected by MTT colometric assay and ELISA.

中文题名反义与反基因寡核苷酸及其萘二酰亚胺偶联物对靶基因表达的抑制作用研究副题名外文题名 The inhibition of the targeted gene expression by the antisense or antigene oligonucleotides and their naphthylimide-conjugated derivatives 论文作者李军生导师张元兴魏东芝教授学科专业生物化工研究领域\研究方向生物化学与分子生物学学位级别博士学位授予单位华东理工大学学位授予日期2001 论文页码总数106页关键词基因表达基因治疗反义寡核苷酸反基因寡核苷酸核酸馆藏号BSLW /2001 /Q78 /264 针对人表皮癌抗阿霉素细胞株（KB-A-1）的多药抗药性问题，本文从反义核酸和反基因核酸角度，通过MTT法检测细胞生长情况，ELISA法检测基因表达产物P-gp表达水平的变化，对寡核苷酸抑制肿瘤细胞MDR1基因表达的机制进行了探讨。

ITS2 and M8 DNA sequences with large variations were screened out of twelve DNA fragments (four nuclear, four chloroplastic and four mitochondrial) to identify tea varieties in Taiwan.

本研究由4个细胞核及8个细胞质（含4个叶绿体及4个粒线体）序列变异较大之片段筛选出具较大序列变异性之ITS2及M8片段，目前开发出ITS2序列与粒线体部分序列，其中品种间ITS2具有33个单一核苷酸多型性，而品种间之M8具有5个核苷酸缺失/插入及2个单一核苷酸多型性。

The dinucleotide repeat motif was the most abundant SSR, accounting for 54%, followed by 22%, 13%, 7% and 4%, respec-tively, for tri-, hexa-, penta- and tetra-nucleotide repeats.

在 2-6 bp 的重复基元中，二核苷酸重复基元的SSRs出现频率最高(54%)，依次是三核苷酸(22%)，六核苷酸(13%)，五核苷酸(7%)和四核苷酸(4%)。

There was higher insertional polymorphism in mangrove populations than inland populations, probably suggesting the activation of retrotransposons by stress and environmental factors.

不同种群的核苷酸多样性水平变化很大，但总的说来，马来半岛的种群核苷酸多样性水平最高，而琉球群岛的种群核苷酸多样性水平最低。

Result 1 Magnetic nanoparticles, magnetic nanoparticles modified with antisense oligodeoxynucleotide of human telomerase reverse transcriptase induced HL-60 tumor cells to apoptosis, we could see typical morphologic change of apoptosis cells: karyopyknosis, chromation"s condensing and aggregation in nuclear, forming crescent-shaped or annulus structures to lean on edge of cell nucleus"s membrane and posing apoptosis body by Atomic Force Microscope, Fluorescence microscope, transmission electron Microscope 2 There was a significant difference compared with control group(p.01), inhibition ratio had significant positive correlation with medication dosage and time ;during 0.8-8μM dosage amplitude, inhibition ratio accrescenced by dosages increasing. However, the inhibition ratio would decrease when dosage over 8-80μM.

结果 1 磁性纳米粒子、修饰有端粒酶反义寡核苷酸的磁性纳米粒子诱导HL-60细胞发生凋亡，原子力显微镜、光学显微镜、荧光显微镜和透射电镜下均观察到HL-60细胞呈现典型的凋亡细胞的形态变化：细胞核固缩，核内染色质浓缩、凝聚、形成新月形或环状结构紧靠在细胞核膜边缘，并形成凋亡小体。2 磁性纳米粒子、修饰有端粒酶反义寡聚脱氧核苷酸的磁性纳米粒子对HL-60肿瘤细胞的生长和增殖有明显的抑制作用，与对照组相比有显著性差异(p＜0.01)，在剂量为0.8-8μmol／L范围内，抑制率随剂量的增加而增加，当剂量超过8μmol／L时，抑制率反而下降；3 磁性纳米粒子、修饰有端粒酶反义寡聚脱氧核苷酸的磁性纳米粒子可增强p53基因的表达活性，引起DNA降解损伤，反向调节细胞周期活动，促使细胞从G0期进入G1期，抑制肿瘤细胞的生长。4 修饰有端粒酶反义寡聚脱氧核苷酸的量子点能通过内吞作用进入HL-60肿瘤细胞的细胞核，可以在细胞内进行定位和促进HL-60肿瘤细胞的凋亡。

Sequence analysis revealed that nucleotides sequence of 28 kD protein gene varied among different isolates of wheat yellow mosaic virus.28 kD protein genes of the Luotian and Huangchuan isolates comprised 762 nucleotidesand were less 3 nt than others,located at the site of 326,327 and 336 nt,respectively.The different isolates shared homologies ranging from 92.1% to 96.9% in nucleotide sequence and 89.8% to 97.3% in amino acid sequence.

序列分析结果表明，小麦黄花叶病毒不同分离物的28kD蛋白基因的核苷酸序列存在一定的差异：湖北罗田和河南潢川分离物在第326，327和336位较四川雅安、江苏扬州及日本分离物缺少3个核苷酸，前两者核苷酸长度为762nt，后三者为765nt；不同分离物核苷酸序列同源性从92 1%到96 9%，相应的氨基酸序列同源性从89 8%到97 3%。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。