核苷酸

Adenosine, a metabolite of adenine nucleotides, is one of the major neuromodulators.

腺苷是腺嘌呤核苷酸的代谢产物，是一种重要的神经调质。

Nicotinamide adenine dinucleotide phosphate oxidase is a major source of reactive oxygen species production in many nonphagocytic cells.

还原型烟酰胺腺嘌呤二核苷酸磷酸氧化酶是许多非吞噬细胞中反应性氧自由基产生的主要来源。

These results are showed that ERCC1 is the important part of human nucleotide excision repair system, which is relevant to drug resistance of ovary and the alimentary canal tumors.

ERCC 1是人类核苷酸切除修复系统的重要组成部分，其表达水平与卵巢肿瘤、消化道肿瘤的耐药性有关。

This study was to identify a novel HLA-DRB 1 allele in Chinese population by nucleotide sequence analysis.

本研究验证一个新的HLA等位基因DRB1*1462的核苷酸序列。

During the postgenomics era the information about genomic sequence and gene functions provides a new foundation for evolutionary biology and ecology As the first whole-genome sequenced plant Arabidopsis thaliana and its wild relatives have played a critical role in understanding the evolution of genomics and speciation Both A halleri and A lyrata are closely related to the model species A thaliana A halleri ssp gemmifera occurs in northeastern China Japan and Taiwan; while its sister A halleri ssp halleri is mainly distributed in Europe Geographical barriers such as Tienshan Mountain Range isolate these intraspecific sisters Likewise A lyrata ssp kamchatica and ssp lyrata occur in East Asia and North America respectively Such distribution patterns seem to be consistent with allopartic speciation The comparison between ancestral and extant polymorphism by multilocus can be informative about the population genetics of speciation In this study we collected and analyzed DNA sequences of 98 genes from four wild relatives of A thaliana A halleri ssp gemmifera A halleri ssp halleri A lyrata ssp kamchatica and A lyrata ssp lyrata The ancestral states of these four species were compared to each other in terms of level of genetic variation However the ancestral species at the time of speciation were substantially more polymorphic than the extant geographical populations The observations are not fully compatible with speciation by strict allopatry At some species pairs parapatric speciation seems more reasonable in speciation of Arabidopsis The 98 gene sequences are also used for the congruence test between gene genealogy and species phylogeny Only 28 genes support the species phylogeny but there are 23 genes supports another major genealogy { lyrata} thaliana Based on the phylogenetic position change of A lyrata ssp kamchatica and Ks value for each species pair suggested the recent directional gene flow between A halleri ssp gemmifera and A lyrata ssp kamchatica

阿拉伯芥是第一个完成基因体定序的开花植物，其基因体资讯提供植物学研究的重要依据；在解析阿拉伯芥属物种的亲缘关系以及种化机制等重要的演化议题时，阿拉伯芥近缘的野生物种自然成了不可或缺的关键；跟阿拉伯芥近缘的物种包括A halleri及A lyrata，其中A halleri ssp gemmifera主要分布於中国东北、日本以及台湾，与近缘的A halleri ssp halleri其分布於欧洲隔著天山及大陆的障蔽，而A lyrata ssp kamchatica主要分布於东北亚及台湾，与分布於北美五大湖的A lyrata ssp lyrata被北极圈所分隔，这样的分布模式暗示异域种化的可能。藉由多基因分析比较祖先物种与现生物种遗传歧异度的相关可提供讯息探讨种化时期的族群遗传结构，本研究针对A halleri ssp gemmifera、A halleri ssp halleri及A lyrata ssp kamchatica、A lyrata ssp lyrata四个物种，两对互为亚种的姊妹群，以阿拉伯芥为外群进行研究，在四个物种完成98个同源基因的分子序列，利用套装软体MCMCcoal来估算祖先物种的遗传变异，亦估算现生物种的核苷酸歧异度，观察到？多物种配对中祖先物种遗传多型性大於现生物种DNA歧异度，显示异域种化模型并无法完全解释阿拉伯芥属物种的种化模式，在某些物种配对间邻域种化模式应比异域种化更为可能；在基因树与物种树的比较，98个基因片段的亲缘模式只有28个是与已知物种树一致的，有23个基因其树状图支持{ lyrata} thaliana的型式，藉由kamchatica位置的变化以及估算各物种配对间的平均同义置换率，推测在A halleri ssp gemmifera与A lyrata ssp kamchatica间具有近代的单方向基因交流。

Based on the work of the first part, we studied the possibility of allyl as a protection group in the synthesis of oligonucleotides consisting in some unstable nucleotide analogues, such as nueleoside carbonate and sulfite.

在寡核苷酸的类似物中，碳酸酯及亚硫酸酯在碱性条件下的不稳定性使其在合成上有一定的困难，这限制了对它们的性质作进一步的研究。

A gene encodes a polypeptide 30 amino acids long containing an alternating sequence of phenylalanine and tyrosine.

对应于这一肽链，下列分子的核苷酸序列是什么？

An accurate new method has been established as an alternative of the test of nucleotide in transfer factor tablets.

本方法准确可靠，为转移因子制剂中核苷酸的定量测定提供了一种新的思路。

The nucleotide and amino acid homology of the 5 isolates is higher than 94% and 96% respectively.

PRSV 5个分离物核苷酸序列的同源性在94%以上，氨基酸序列的同源性在96%以上。

The similarity of nucleotide is 88.1% and the similarity of amino acid is over 90%.

通过在NCBI上进行比对，发现它和拟南芥热激蛋白基因有很高的同源性：核苷酸的同源性在88.1％，氨基酸的同源性在90％以上。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。