阻遏

The highest enzyme producer alkalophilic Bacillus sp SHY8-1 among the inductive strains was mutagenized several times, by adding enzyme production repression aegents into screen medium, combined with natural seperation and pressure selection, finally a CMCase-hyperproductive mutant SHY8-1-25 (partitally resistant to catabolite) was obtained, with the yield of CMCase raised to 13-16u/ml, maximally reached 18-20u/ml, while its parent strain 0.654u/ml.

对诱导型产酶菌-嗜碱芽孢杆菌SHY8-1进行了多次诱变改良，采用添加产酶阻遏剂的平板作为筛子，结合反复的自然分离、压力选择，最终成功地获得了高产变异株SHY8-1-25(已部分解除分解代谢阻遏)，产酶量由0.654u/ml提高到13-16u/ml，最高达到18-20u/ml，讨论了诱变机理策略，考察了碳、氮源等对产酶的影响，对培养基和摇瓶培养条件进行了优化。

Chloromycetin had positive effect on BADH gene expression, and the effect might be due to inhibit repressor generation in mitochondria and activate transcription factor of BADH gene.

应用氯霉素的实验表明氯霉素对BADH基因表达为正效应，提出了可能是抑制了线粒体中的阻遏蛋白的产生使BADH基因表达去阻遏。

Although plant growth was affected by the herbicide, no evidence of repression or derepression was observed.

尽管植物的生长受到除草剂的影响，但还未观察到阻遏或解阻遏的证据。

Although plant growth was affected by the herbicide , no evidence of repression or depression was observed

尽管植物的生长受到除草剂的影响，但还未观察到阻遏或解阻遏的证据。

It contains: starch 3%, glucose 2%, soybean meal 2%, peptone 0.5%, fish meal 0.5%,2S040.15%, MgSO4 0.1%, KI-12P040.04%, CaCO3O.4%, soybean oil 1%, propyl alcohol 0.4%(added at the 18th hour of batch fermentation).

发酵培养18小时补加0.4％的正丙醇。原始霉素的发酵存在碳源分解物代谢阻遏现象和氮源分解代谢物阻遏现象。

A small molecule that binds to a repressor protein to allow repressive activity.

结合到阻遏蛋白上使其产生阻遏活性的小分子。

Amino acid mutant site A43V locates in N-terminal headpiece of represser protein which binds specifically to DNAand amino acids mutant sites S93L, S102N, G315S, Q180R, M2491, I283T all locate in the core region of represser protein which binds to IPTG.

氨基酸突变位点A43V位于阻遏蛋白氨基末端，是阻遏蛋白和操纵基因的结合区；S93L、S102N、G315S、Q180R、M249I、I283T均位于阻遏蛋白核心区，即阻遏蛋白和IPTG结合区。

I. Design and selection of thc high affinity DNA ligands for singIe-chain reprcssorSingle-chain repressor RRn., is a derivative of bacteriophage 434 repressor,which contains covalent1y dimerized DNA-binding domains (axnino acids 1-69) of thephage 434 repressor.

一。设计和筛选单链阻遏蛋白的高亲和力DNA结合序列单链阻遏蛋白RR_是噬菌体434阻遏蛋白的衍生物，它是噬菌体434阻遏蛋白的N端DBD（1—69位氨基酸）组成的共价二聚体。

The results led to the conclusion that induction and repression were under the control of specific proteins, called repressors, which were coded by regulatory genes.

得出了诱导和阻遏是由被称为阻遏物的特殊蛋白质控制的结论，阻遏蛋白是由调节基因编码的。

The homeodomain is responsible for binding to DNA, and experiments to swap homeodomains between proteins suggest that the specificity of DNA recognition lies within the homeodomain, but (like the situation with phage repressors) no simple code relating protein and DNA sequences can be deduced.

同源域负责结合DNA，在蛋白质之间交换同源域的实验证实了这一结论。但（就像噬菌体阻遏子的情形一样）并没有推出联系蛋白质与DNA序列的简单机理。同源域的C端和原核生物阻遏子α-β-α超二级结构有一定的同源关系。我们回想第13章，λ阻遏子有一个&识别螺旋&（α-螺旋-3）DNA的大构接触，而另一个螺旋（α-螺旋-2）位于 DNA的拐角。

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。