单基因的

They discovered how to inactivate , or knock out , single genes in laboratory animals.

他们发现了如何在实验动物上对单基因进行失活或敲除，得到所谓的"敲除小鼠"。

Gravid An. sinensis demonstrated significant negative taxis towards bacteria A4 and Aeromonas sp., as well as slight taxis to Enterobacter sp., implying that the three bacteria were not the dietary preference for An. sinensis. However, in light of the possibility of their stable colonization into mosquito's guts, these strains may serve as the host cells of larvicide genes and transgenic anopheline antimalarial genes.

中华按蚊产卵时对A4菌和气单胞菌具有明显的负趋性，而对肠杆菌仅具有微弱的趋向性，推测这3种细菌可能不是中华按蚊食物的优先选择，但具有在蚊中肠内较为稳定存活的可能性，因此更适合于作为蚊幼生物杀虫基因的寄主细胞和仿转基因按蚊抗疟基因的寄主细胞被应用。

Synthesis of monoglyceride comtaining omega-3 fatty acids by microbial lipase in organic solvent.

邓子新。类产碱假单胞菌耐热碱性脂肪基因的克隆。

The group disposed by Acetylspiramycin doesn"t show parallel results; The strip gray scale of exotoxin A decreased gradually with the increasing dosages of Azithromycin and Roxithromycin, which doesn"t show in group disposed by Acetylspiramycin and group PAO-JP2; The strip gray scale of lasR, detected by RT-PCR, decreased gradually with the increasing dosages of Azithromycin, which doesnt show in group PAO-JP2.Conclusions: There were obvious differences between PAO1 and PAO-JP2 in biology characteristics in vitro.

本研究发现大环内酯类药物在生物被膜培养过程中分别处理PAO1、PAO-JP2，结果提示大环内酯类药物(14、15元环)通过对QS系统的影响可有效抑制铜绿假单胞菌生物被膜的形成；通过QS系统有效抑制铜绿假单胞菌的毒力因子的产生，16元环的大环内酯类药物乙酰螺旋霉未见上述结论；lasR基因的反转录结果提示阿奇霉素可在转录水平抑制QS系统发挥其作用。

18 Patients with radioresistant NPC and 30 patients with radiosensitive NPC are included in the case-control study. Genomic DNA was extracted from peripheral blood lymphocytes by proteinase K digestion and phenol/chloroform extraction.

本研究旨在通过调查MDR1基因的单核苷酸多态性在鼻咽癌放射敏感和放射抵抗患者中的分布以及上述多态性对MDR1 mRNA在分具不同放射敏感性的三株细胞系内的差异表达的影响，探讨MDR1基因多态性与鼻咽癌放射敏感性的相关性。

Methods: Anergic T cell was induced by combination of B7-1 mAb and cyclosporin A in vitro, cytokine gene of anergic T cells was detected by RT-PCR.

将B7-1单抗和CsA联用在体外诱致了抗原特异性T细胞无能，采用RT-PCR法检测了无能T细胞细胞因子基因的表达。

There is only one copy of actin in Chlamydomonas reinhardtii Cr.

在衣藻细胞中肌动蛋白基因以单拷贝的形式存在，其表达产物在鞭毛，细胞质和受精管中都有发现。

Lastly, based on analysis on phylogentic relationships among 39 ciliates combined with their main morphologic characters, some conclusion were drawn: 1 the monophyly of the peritrichs was strongly supported, and its subclass rank in the class Oligohymenophorea is reasonable; 2 the genus Epistylis might not be monophyletic, and the peristomial area, especially the peristomial lip, might be an important phylogenetic character within the genus Epistylis; 3 the taxonomic rank of the genus Carchesium and the genus Campanella were suggested to be adjusted; 4 Opisthonecta probably diverged from peritrichs with stalks; 5 the phylogenetic tree of peritrichs was reconstructed based on the molecular information inferred from SSrRNA gene sequences and the morphology.

测定了6科8属13种缘毛类纤毛虫的SSrDNA序列，将构建的最大简约树和邻接树与形态学相结合，分析得出：1）缘毛类纤毛虫是单系的，其分类地位是隶属于纤毛门寡膜纲缘毛亚纲：2）指出累枝虫属可能不是单系的，口围区是累枝虫属中重要的系统发育特征；3）建议调整独缩虫和聚钟虫属的分类地位；4）得出后游虫可能是由有柄缘毛类进化而来的类群；5）基于缘毛类反口区结构和SSrRNA基因序列提供的信息重建了缘毛类纤毛虫的系统发育树。

He merle gene is very common, and very popular, in the Australian Shepherd breed (they are sometimes called "those little blue dogs");,it is relatively common among Collies and Shelties as well.

产生双merle的唯一途径就是二只陨石繁殖。其结果，统计学上四分之一的宝宝为正常色，二分之一为携带单merle的陨石，另四分之一就是双merle基因的宝宝。澳牧中merle基因就广泛地存在，在边境和小喜也较常见。

In order to study themolecular and regulation mechanism deeply, in this study, based on constructing suitableNILs of total RNA pools of opposite maize and mutual maize, singleendonuclease digestion cDNA-AFLP technology was applied to screen , isolation andbioinformatics analyze the gene differentially expressed fragments related to the oppos...

为了深入地研究这一珍贵突变材料形成的分子机理和调控机制，本研究中，通过构建合适的玉米对生、互生近等基因系总 RNA池，采用改进的单酶切cDNA-AFLP 技术，对扩增的玉米对生性状相关基因的差异表达片段进行筛选、分离和生物信息学分析。

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。