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.

對(duì)誘導(dǎo)型產(chǎn)酶菌-嗜堿芽孢桿菌SHY8-1進(jìn)行了多次誘變改良极品婬荡少妇XXXXX，采用添加產(chǎn)酶阻遏劑的平板作為篩子久久精品1，結(jié)合反復(fù)的自然分離、壓力選擇，最終成功地獲得了高產(chǎn)變異株SHY8-1-25(已部分解除分解代謝阻遏)岛国性爱视频在线，產(chǎn)酶量由0.654u/ml提高到13-16u/ml欧美18XXOO视频在线喷水，最高達(dá)到18-20u/ml，討論了誘變機(jī)理策略日本免费的黄色网站，考察了碳免费体验观看无码A片120秒、氮源等對(duì)產(chǎn)酶的影響，對(duì)培養(yǎng)基和搖瓶培養(yǎng)條件進(jìn)行了優(yōu)化日韩美女A级毛男。

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.

應(yīng)用氯霉素的實(shí)驗(yàn)表明氯霉素對(duì)BADH基因表達(dá)為正效應(yīng)国产一伦一色一情，提出了可能是抑制了線粒體中的阻遏蛋白的產(chǎn)生使BADH基因表達(dá)去阻遏。

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

盡管植物的生長受到除草劑的影響欧美人妖一区二区三区，但還未觀察到阻遏或解阻遏的證據(jù)亚洲欧美日韩综合久久久久久。

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

盡管植物的生長受到除草劑的影響，但還未觀察到阻遏或解阻遏的證據(jù)国产在线偷窥盗摄精品福利。

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).

發(fā)酵培養(yǎng)18小時(shí)補(bǔ)加0.4％的正丙醇www.madou.福利。原始霉素的發(fā)酵存在碳源分解物代謝阻遏現(xiàn)象和氮源分解代謝物阻遏現(xiàn)象。

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

結(jié)合到阻遏蛋白上使其產(chǎn)生阻遏活性的小分子色色月。

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.

氨基酸突變位點(diǎn)A43V位于阻遏蛋白氨基末端黄色视频全免费，是阻遏蛋白和操縱基因的結(jié)合區(qū)；S93L黄片WWW.Av免费视频、S102N一级性生活XX视频、G315S、Q180R日本超刺激视频在线观看网站、M249I一级绝黄A片AAA、I283T均位于阻遏蛋白核心區(qū)，即阻遏蛋白和IPTG結(jié)合區(qū)黄色录像网站一个片。

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.

一啪啪免费特级黄片。設(shè)計(jì)和篩選單鏈阻遏蛋白的高親和力DNA結(jié)合序列單鏈阻遏蛋白R(shí)R_是噬菌體434阻遏蛋白的衍生物，它是噬菌體434阻遏蛋白的N端DBD（1—69位氨基酸）組成的共價(jià)二聚體欧美色综合,色综合。

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.

得出了誘導(dǎo)和阻遏是由被稱為阻遏物的特殊蛋白質(zhì)控制的結(jié)論你懂网站在线观看，阻遏蛋白是由調(diào)節(jié)基因編碼的。

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.

同源域負(fù)責(zé)結(jié)合DNA欧美成人嘿咻在线视频，在蛋白質(zhì)之間交換同源域的實(shí)驗(yàn)證實(shí)了這一結(jié)論能观看的三级国产tv视频网址。但（就像噬菌體阻遏子的情形一樣）并沒有推出聯(lián)系蛋白質(zhì)與DNA序列的簡單機(jī)理。同源域的C端和原核生物阻遏子α-β-α超二級(jí)結(jié)構(gòu)有一定的同源關(guān)系亚洲永久精品一区二区在线观看。我們回想第13章亚洲色无码一级毛片一区二区野外，λ阻遏子有一個(gè)&識(shí)別螺旋&（α-螺旋-3）DNA的大構(gòu)接觸，而另一個(gè)螺旋（α-螺旋-2）位于 DNA的拐角黄色带国产网站。

catabolite repression：分解代謝物阻遏

9.分解代謝物阻遏(catabolite repression) 當(dāng)培養(yǎng)基含有多種能源物質(zhì)時(shí),微生物首先利用更易于分解利用的能源物質(zhì),而首先被利用的這種物質(zhì)的分解對(duì)利用其他能源性物質(zhì)的酶的產(chǎn)生阻遏作用.

repressible enzyme：阻遏酶

再沉淀 reprecipitation | 阻遏酶 repressible enzyme | 阻遏 repression

repressible enzyme：阻遏

replisome 復(fù)制體 | repressible enzyme 阻遏 | repressible system 阻遏系統(tǒng)

repressible system：阻遏系統(tǒng)

repressible enzyme 阻遏 | repressible system 阻遏系統(tǒng) | repression resistant mutant 抗阻遏突變型

repressible operon：可阻遏操縱元

復(fù)制子 replicon | 可阻遏操縱元 repressible operon | 阻遏物環(huán)狀結(jié)構(gòu) repression loop

repression：阻遏

3.誘導(dǎo)(induction)與阻遏(repression):可誘導(dǎo)基因在特定環(huán)境中表達(dá)增強(qiáng)的過程稱為誘導(dǎo). 可阻遏基因表達(dá)產(chǎn)物水平降低的過程稱為阻遏. 25、分解代謝物基因激活蛋白(CAP)對(duì)乳糖操縱子表達(dá)的影響是( )6.答:1961年,

enzyme repression：酶的阻遏

毒物代謝酶的阻遏(enzyme repression)較酶誘導(dǎo)作用少見. 有時(shí)對(duì)某些毒物代謝酶的誘導(dǎo)的同時(shí)也阻遏了另一些毒物代謝酶的阻遏. 如某些過氧化物酶體增生劑能顯著地降低幾種GST和CYP同工酶的表達(dá),

enzyme repression：阻遏

毒物代謝酶的阻遏(enzyme repression)較酶誘導(dǎo)作用少見. 有時(shí)對(duì)某些毒物代謝酶的誘導(dǎo)的同時(shí)也阻遏了另一些毒物代謝酶的阻遏. 毒物代謝酶的激活(activation)是指外源化物直接作用于酶蛋白,使其活性增加.

repressive regulation：阻遏地

阻遏 repression | 阻遏地 repressive regulation | 阻遏物 repressor

repressor：阻遏物

當(dāng)lac阻遏物(repressor)結(jié)合在操縱基因上時(shí)阻止該操縱子的轉(zhuǎn)錄,阻遏物同操縱基因的結(jié)合由于誘導(dǎo)物別乳糖同阻遏蛋白的結(jié)合而解除其抑制作用. Rutger-Newark的化學(xué)教授Babis Kalodimos及其同事利用核磁共振(NMR)波譜來確定蛋白質(zhì)如何在雙螺旋結(jié)構(gòu)的DNA長鏈上滑動(dòng)并到達(dá)它們的靶位點(diǎn)-- 一段特異的DNA序列.