查询词典 conserved

Ecotourism Where in situ conservation is not possible, species or their DNA must be conserved by ex situ methods in museums, herbaria or zoos if they are to be preserved at all.

基因库 当物种及其DNA不可能就地保护时，就必须在博物馆、植物标本馆或动物园中易地保护。

The transforming growth factor-β superfamily, a large group of highly conserved growth factors including TGF-βs, activins and BMPs, regulate a wide variety of cellular functions such as proliferation, differentiation, apoptosis and migration. Signals from these growth factors are transduced by a group of Smad proteins. To date, there are nine vertebrate Smads, including the receptor-activated Smads , Smadsl-3, 5 and 8, the common mediator Smad4 and Smad4β, and the inhibitory Smads, Smad6 and 7. Signaling is initiated when the ligand induces assembly of a heteromeric complex of type Ⅱ and type Ⅰ TGFβ receptors. Then R-Smads are directly phosphorylated by activated type I TGF-β receptors.

在多种SMADS中，SMAD5令我们产生兴趣，基于三个原因：1、Smad5基因敲除胚胎中发现卵黄囊的异位造血以及CFU-GM祖细胞数目增加，表明SMAD5可能是早期造血发育的负向调控基因。；2、应用反义核酸封闭Smad5可以逆转TGF-β对祖细胞增殖的抑制效应，表明它可能介导TGF-β信号转导，后者的异常，包括某些SMADS的功能异常，和白血病紧密相关；3、Smad5基因定位在人染色体5q21，此区域的缺失和急性髓系白血病和骨髓增生异常综合症相关，因此，Smad5被怀疑为白血病抑制基因。

This factor is highly conserved in mammalian animals and only one heterozygous LIF mutation was reported to cause the infertility of women.

LIF在所有的哺乳动物中都具有高度的保守性，某些氨基酸在不同物种中保持不变。 LIF中29位氨基酸在所有的哺乳动物中都是Q。

Telomere, a complex structure present at the ends of eukaryotic chromosomes, consists of tandam arrays of highly conserved hexameric repeats in vetebrates. Its function is to protect DNA from degradation of deleterious recombination.

端粒是由许多简单重复序列及相关蛋白组成的染色体末端复合结构，端粒酶是具有逆转录酶特性的核糖核蛋白复合物，能以自身的RNA为模板合成端粒重复序列，加至新合成的DNA链末端，维持端粒平衡从而保证染色体末端结构完整性及解决末端复制问题。

Then the fusion protein was primary purified by affinity chromatography. The GST tail of the fusion protein was cleaved by Thrombin. Nucleotide sequence analysis showed that the gdh gene of S.suis possesses the highly conserved motifs typical of family I hexameric GDHs.

猪链球菌2型谷氨酸脱氢酶编码基因克隆、序列分析及原核表达根据已发表的猪链球菌2型的gdh基因设计引物，扩增海安病人分离株Habb中的目的基因，并进行序列测定和分析；构建重组表达载体pGEX4T-2-gdh，在大肠杆菌中表达，并纯化重组蛋白。

Conserved motifs are found in many of the homeotic and segmentation genes.

HOM-C基因在决定前-后轴的性质方面有什么基本功能呢？

In this review, we use Arabidopsis thaliana and Oryza sativa as examples, and summarize the study results of floral homeotic MADS-box genes in two major groups of angiosperms — core eudicots and monocots — over the past decade. Our aim was to review the functional conservation and diversity of floral homeotic MADS-box genes in angiosperms and discuss whether the ABCDE model has been conserved in monocotyledons.

本文以模式植物拟南芥和水稻为例，综述了近10年来对被子植物两大主要类群——核心真双子叶植物和单子叶植物花同源异型MADS-box基因的研究成果，分析MADS-box基因在被子植物中的功能保守性和多样性，同时探讨双子叶植物花发育的ABCDE模型在多大程度上适用于单子叶植物。

Studieson the rice reproductive organ mechanisms will be significant in theory and in practice.Now over 70 homeotic genes have been cloned from rice by using the conserved sequencesof the homeotic genes of dicots as probe screening the rice genomic library or cDNA.

属于单子叶植物，是发育分子生物学研究领域中常用的一种模式植物，同时也是世界上最重要的粮食作物之一，其花器官发育的结果直接影响稻谷产量和品质，因此对其花器官发育的研究有着深远的意义。

Comparative analysis of some rbcL gene cDNA sequences between wheat and other species were also carried out, the result suggested that the rbcL gene was highly conserved in examined species, common wheat is more closer related with Hordeum, Psathyrostachys, Leymus, Elymus than with Oryza and Zea.

进一步比较分析了在相关物种中rbcL基因的cDNA序列，结果显示，rbcL基因的编码区在不同属的物种间高度保守，并从分子水平表明小麦与大麦、新麦草、赖草、披碱草属等的亲源关系比与水稻、玉米等的近。

The protein products of Hox genes,as transcription factors,are also highly conserved.

Hox基因是存在于染色体上的一段高度保守序列，其蛋白产物作为转录因子也是高度保守的。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。