查询词典 mutant

They then scanned the mutant fish for unusual traits. One mutant was almost scaleless, reminiscent of domesticated mirror carp bred to lack many scales to be easy to clean.

一种流行的理论认为，基因组拷贝了一些关键的基因，因此一旦有突变破坏了这些基因，生物体还留有一个备份。

In this study, a stress induction expression promoter of monocotyledon (P-WCS120) was amplified from wheat genome. The result of sequencing displayed a base substitution mutant of 1 bp and an insertion mutant of 21 bps. This sequence was registered at GENEBANK as a new found sequence, because 3% of the sequence was found to be non-homologous with the original sequence.

本研究从小麦基因组扩增单子叶植物逆境诱导表达启动子P-WCS120，测序证明包括1个碱基的替代突变和21个碱基的插入突变，与原序列有3%的非同源性，被GENBANK认定为新发现序列，现已登记注册。

The results revealed that there was nosignificant difference between the symptoms produced by the mutant and thewild type strain by directly injecting the bacteria into mature turnip leaves,however,the mutant was nonpathogenic by inoculations with leaf-clippingand-spraying methods.

应用不同的接种方法对胞外多糖突变体的致病性进行了分析，发现突变体通过注射接种仍能产生与野生型相同症状，但通过喷雾和剪叶接种却完全丧失了致病能力，说明甘蓝黑腐病菌产生的胞外多糖可能在致病过程的早期阶段起作用，但对症状的产生不是必须的。

Pokeweed antiviral protein belongs to Ribosome-inactive Proteins. PAP has potent antiviral activity against many plant virus. pT1 was used as the template to amplify the deleted mutant PAP gene (N-deleted and N-,C-deIeted) by PCR and then the two genes were cloned into expression vector. Different IPTG-inducible expression vector containing different deleted mutant PAP gene was constructed and transferred into E.coli strain BL21 (DE3)-plysS.

美洲商陆抗病毒蛋白是一类能很好的抑制植物病毒的蛋白，很早就有报道低剂量的商陆叶片粗粉末就能明显的抑制TMV在菜豆叶片上局部枯斑的形成，PAP缓释剂也已用于病毒病的防治工作，但美洲商陆抗病毒蛋白属于核糖体失活蛋白，它对生长的细胞会有一定的毒性。

Next, BALB/c mice were orally infected with Y. pseudotuberculosis and its ompR mutant to study metabonomic variation of different intestine-associated organs after 24 h infection. The results showed that a majority of metabolites were decreased during this acid adaptation process, but phosphoenolpyruvate, 5'-GMP, 5'-AMP, 5'-UMP, GDP/GTP of wild type strain and lactate, Tyr, phosphoenolpyruvate, 5'-AMP、GDP/GTP of the ompR mutant strain were increased.

为了探讨病原细菌感染动物后特别是在酸性环境下代谢物的变化规律，首先在体外模拟假结核耶尔森氏菌及其全局性调控因子OmpR突变株在适应酸性环境时所引起的菌体自身的代谢变化，然后通过BALB/c小鼠口服感染耶尔森氏菌，研究小鼠感染病原细菌24h后各种相关器官的代谢变化。

For further investigation on the mutant proteins, we reconstitute wild type and mutant proteins with 〓,〓 and 〓.

为进一步考察半胱氨酸突变后，金属硫蛋白在结构上的变化，我们用〓，〓和〓对野生型及其突变体蛋白进行重组。

A mig (mannose insensitive germination) mutantpool, which was created with T-DNA insertion by Kenneth Feldmann, University ofArizona (ecotype Wassilewskija-2, Ws-2), was obtained from the Nottingham ArabidopsisStock Centre, UK. mig3 is one line of the mutant pool, which was thought as aputative mutant for having a high germination rate (about 70%) on MS media containingabout 5-7.5 mM mannose. Lately, the mig3 was found there are some special characteristicsin two French labs by Laurent Signore and Marlire Dieuaide.

本文作者就是以这一突变体为研究对象，开展了有关控制mig3突变体的基因的定位研究研究；并同时开展了在几种糖及其衍生物诱导下的光合作用有关基因表达的研究；这一突变体在开花前后几种糖分含量的调查；开花习性及形态方面的调查。

In order to find new kinds of antibacterial agents, a primary screening model has been set with the DNA gyrase B subunit as a target, and then the active compounds of positive strain were purified. From Mycobacterium phlei, we isolated a novobiocin supersensitive mutant M.phlei SS12 and a resistant ~mutant M.phlei RR11 with NTG and UV.

实验采用Mycobacteriumphlei为出发菌株，利用NTG和紫外线复合诱变得到新生霉素特异性的超敏菌株M.phleiSS12和耐药菌株M.phleiRR11，建立了以DNA回旋酶B亚基为靶点的抗结核药物的筛选模型；并应用此模型对1600株真菌和100株放线菌发酵液进行了初筛，获得了38株阳性菌，阳性率为2.4%；对阳性菌株3277的发酵液进行了提取分离，得到X1和X2两个活性化合物。

Enterobacter aerogenes was irradiated by He-Ne laser to optimize the laser mutagenesis condition, and to test the heredity, aciduric and hydrogen-producing potential of the mutant. An aciduric mutant with steady hydrogen-producing capability, which was able to grow at acidic pH of 3.0, was obtained. Its capability of hydrogen production was measured in the batch culture experiment.

闻建平，陈宇，刘铭辉(天津大学化工学院生物工程系，天津300072)摘要：运用He—Ne激光辐照产气肠杆菌，对激光诱变参数进行优化，考察了突变株的遗传稳定性、耐酸性和产氢特性结果筛选到一株遗传性状稳定的高产氢突变株，具有良好的耐酸性，在pH值3.0 时仍能生长。

Two kinds of highperformance expressions of eukaryotic system of human mutant CD59 cDNA were successfully established, which makes further study of mutant CD59 glycation and anticomplement activity possible, and thus elucidate the mechanism of blood vessel proliferation in diabetes.

成功建立了两种高效表达人CD59突变体的真核表达系统，能够进一步研究人CD59的突变体糖基化及抗补体活性，为阐明糖尿病血管增殖性病变的发病机制奠定了基础。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。