核酸酶

Our results suggest that COX-2 activity is involved in ethanol-induced HCV-RNA and NS5A protein expression, because acetylsalicylic acid, a COX-1/2 inhibitor, blocked this induction and downregulated COX-2 protein expression and activity.

研究结果表明，环氧合酶-2活性，涉及酒精介导的丙型肝炎病毒核酸及ns5a区蛋白表达，因为环氧合酶-1 / 2抑制剂——乙酰水杨酸，可阻断这种诱导机制，并下调环氧合酶-2蛋白的表达和活性。

One whole genes named of BTX8 express β-glucosidase activity respectively were obtained.

得到一个内切葡聚糖酶活性相关的核酸片段NQX10和一个内切葡聚糖酶活性相关的基因NQX3，一个表达β-葡萄糖苷酶活性相关的基因BTX8。

On the basis of this system andpreviously morphological, physiological and biochemical studies on cucumber in vitrogynogenesis. Materials from both typical gynogenesis using M99 as induction medium andnon gynogenesis using W5 as induction medium were collected. The activities anddistribution of peroxidase and its isoenzymes, content of soluble protein and distribution of allprotein during early stage of cucumber in vitro gynogenesis and non gynogenesis wereinvestigated by biochemistry and histochemistry technology.

本试验在前期有关离体黄瓜雌核发育形态学和生理生化研究的基础上，以诱导离体雌核发育的 M99 培养基上和非雌核发育的 W5 培养基上培养的黄瓜未受精子房为试材，采用生物化学技术和组织化学技术，深入研究了离体雌核发育早期外植体内的标志酶——过氧化物酶及其同工酶的活性及分布的变化、可溶性蛋白质的含量和总蛋白质分布的变化及核酸和多糖分布的变化，为揭示离体雌核发育早期的细胞分化机制提供科学依据。

Two modified beacons containing of uracil and hypoxanthine have been used to validate the assay on purified proteins with success. However, while applying the assay to cell extracts, the results were interfered by non-specific nuclease activities.

我们分别设计其中含有尿嘧啶以及inosine的分子信号，以测定尿嘧啶-核酸醣解酶（uracil-DNA glycosylase）以及次黄嘌呤-核酸醣解酶（hypoxanthine-DNA glycosylase）的活性。

The PSCA_3 fragment was selected for its superior expression level in eukaryotic cells.Then the sig-PSCA_3-Fc-GPI genetic fragment was cloned into pVAX1-neo-IRES-GM/B7 vector to construct the final immunological inhanced DNA vaccine pVAX1-PSCA_3-FcGB. Immunofluorescence and flow cytometry were used to confirm the expression of PSCA_3 fragment by transfected into Cos7 cell.Finally,the anti-tumor effect of pVAX1-PSCA_3-FcGB was tested in murine prostate cancer model generated by RM-1 cell line.The animal was immunized with pVAX1-PSCA_3-FcGB DNA vaccine by intramuscular injection plus electroporation,pVAX1 and pVAX1-PSCA_1-FcGB plasmid were used as control.The inhibitory effect of tumor was investigated by observion of forming time,volume and inhibition ratio of tumor.Results:DNA sequencing conformed that the heterological PSCA fusion antigen fragment which was synchronized by overlapping-extending-PCR,was consistent to design.Enzyme digestion analysis showed that the 1 to 4 copies heterological PSCA fusion antigen fragments were constructed successfully.

方法(1)检索GenBank，选择包含人主要T细胞抗原表位序列的人PSCA基因片段，应用异种化抗原设计技术，保留人T细胞抗原表位，设计异种化PSCA融合抗原片段；(2)根据核酸序列按中心模板法设计引物，应用重叠延伸PCR技术拼接合成异种化PSCA融合抗原片段基因，以PCR、限制性酶切和DNA序列测定法进行鉴定：(3)利用DNA限制性内切酶BssHⅡ和MluⅠ酶切后粘端互补的特点，采用同尾酶法构建1—4拷贝异种化PSCA融合抗原片段(PNCA_1-PSCA_4)，并将上述片段分别插入真核表达载体pCI-neo-Fc-GPI中，转染293T细胞，借助免疫荧光+流式细胞术考察插入片段表达效率，最终选定PSCA_3片段进行下一步研究；(4)将sig-PSCA_3-Fc-GPI基因片段自pCI-PSCA_3-Fc-GPI质粒上切下，插入pVAX1-neo-IRES—GM/B7载体中，构建免疫增效DNA疫苗pVAX1-PSCA_3-FcGB，并应用转染Cos7细胞+免疫荧光/流式细胞术方法鉴定其在真核细胞中的表达情况；(5)给8周龄雄性C57BL/6小鼠皮下种植RM-1细胞，制备小鼠前列腺癌模型，并采用股四头肌肌肉注射+电脉冲法(Electroporation，EP)接种DNA疫苗质粒pVAX1-PSCA_3-FcGB，同时接种pVAX1空载体质粒和pVAX1-PSCA_1-FcGB质粒作为对照，通过观察计算免疫动物的成瘤时间、肿瘤体积和抑瘤率，来评价该DNA疫苗在小鼠体内的抑瘤效果。

Reactions of 2-methyl-1,4 naphthoquinone with human telomeric DNA and telomerase RNA ESR spin elimination has been used with 4-oxo-TEMPO as spin trap. The reactivities of 3VK3* with telomeric DNA, template of telomerase RNA and its L6-P6 region have been confirmed respectively. The results show that the reactivity of 3VK3* with polynucleotides is directly proportional to their G amount, and the one for reaction of 3VK3* with telomeric DNA is the highest in polynucleotides. 2. Reactions of 2-methyl-1,4 naphthoquinone with nucleosides, nucleotides ESR spin elimination has been used with 4-oxo-TEMPO as spin trap.

2-甲基-1，4萘醌与端粒DNA及端粒酶RNA亚基光敏反应性的研究应用ESR自旋消减法，对2-甲基-1，4萘醌(VK3)与端粒DNA重复序列、端粒酶RNA亚基模版序列、端粒酶RNA亚基L6-P6发夹区关键序列的光敏反应性进行了研究，结果表明，在一定波长照射下，明显诱导VK3与上述寡聚核苷酸反应，其反应性大小与核酸中鸟嘌呤含量正相关，其中端粒DNA序列反应性最强。

Results After screening, 59 subtracted library clones were isolated which were specific for strain VIB72, and the DNA sequences of these clones were determined. Seventeen fragments showed high homology to the genes of known functions in other bacteria. This includes soluble lytic murein transglycosylase, mobilization protein, transposase (IS66), resistance-related protein (metallo-beta-lactamase and acetyltransferase family), toxin protein (DT-201 and alveicin A immunity protein), ATP-dependent endonuclease of OLD family like protein, SocE and GTP-binding protein HflX (high frequency of lysogenization).

通过对差减文库筛选，分离到59个对菌株VIB72的克隆，并对这些克隆的DNA序列进行了测定。17个基因片断与其它细菌的已知功能的基因有较高的同源性，其中包括可溶性溶胞壁质转糖基酶、转移蛋白MobA和MobC、转座子IS66、抑制相关蛋白（金属β-内酰胺酶和乙酰转移酶家族）、毒素蛋白（DT-201和alveicin A免疫蛋白）、与OLD 家族相似的ATP依赖性核酸内切酶以及SocE 和GTP结合蛋白HflX。

Hepatitis B virus is the smallest DNA virus which is a member of the viral family Hepadnavirida. It uses its DNA as template and the RNA polymerase II of the host cells to transcribe its viral transcripts. There are four major RNAs transcribed from HBV genome. All of the four major transcripts are unspliced, terminated at a common site, polyadenylated at the 3' terminal and capped at the 5' terminal.

B 型肝炎病毒属於肝病毒科，为目前已知最小的去氧核醣核酸病毒，利用其病毒的去氧核醣核酸以及宿主细胞内的核醣核酸聚合酶可转录出四种主要的核醣核酸产物，此四种主要的转录产物均未经剪接并终止於核心开放编阅序列的共同polyadenylation 讯号，且在其5'端均经过capping修饰。

A novel double hairpin molecular beacon that has more stable structure than traditional molecular beacon has been designed. Its hairpin structure will not fully open when it hybridizes to cDNA but the hybrid can be cut by restriction endonucleases, which leads to destroy of its structure and restore the fluorescence.

本论文的主要内容包括以下三个方面：(1)基于双发夹分子信标分析核酸甲基化酶及药物筛选我们设计了新型分子信标-双发夹分子信标，该探针具有比传统分子信标更稳定的分子结构，与互补核酸链杂交后发夹结构不完全打开，但在酶切反应后其发夹结构被破坏，荧光又可恢复。

Deoxyribonuclease for cystic fibrosis.

脱氧核糖核酸酶为囊性纤维化。

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％。