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Members of the purine group include adenine and guanine, which are constituents of the nucleic acids, and certain plant alkaloids, e.g.

嘌呤基的成员包括腺嘌呤和鸟嘌呤，它们是核酸以及某些植物生物碱的成分，如咖啡因和可可碱。

Folic acid is necessary for synthesis of nucleic acids and formation of the heme component of hemoglobin in red blood cells.

叶酸对核酸的合成及红血球中血红蛋白的血红素的形成来说是必需的。

The high fidelity of DNA replication is guaranteed by the high specificity of nucleic acid base pairing in DNA.

在DNA中碱基配对的高度专一性保证DNA复制的高度精确性，所以在DNA的复制过程中必须保持碱基配对的完整性。

The result of agarose gel electrophoresis illustrated that it was a better method to separate nucleic acid from cell suspension of histiocyte and blood.

电泳结果表明磁性微球可以很好地从细胞悬液、组织、血液等样品中分离得到高质量的核酸。

Originally designed to homogenize plant tissue for nucleic acid and protein isolations, it has since found use in all areas of biological research that require high throughput homogenization.

最初设计用于均质核酸和蛋白质的植物组织，目前已应用在所有需要高吞量同质的生物学研究中。

The results of homology of sequence analysis indicated that the region from 200 to 400 amino acid of P6 could be the binding domain for the nucleic acid.

序列同源性分析结果显示，P6的核酸结合区域可能在第200到400位氨基酸之间。

A method for detecting the presence of a target nucleic acid sequence in a sample, said method comprising subjecting said sample to an amplification reaction using a set of nucleotides, at least one of which is fluorescently labelled, contacting amplification product with a probe under conditions in which the probe will hybridise to said target sequence, said probe comprising a reactive molecule which is able to absorb fluorescence from or donate fluorescent energy to said fluorescent labelled nucleotide and monitoring fluorescence of said sample.

一种用于检测在某样品中是否存在目标核酸序列的方法，该方法包括：使用一套核苷酸对所说的样品进行扩增反应，其中至少一个核苷酸是被荧光标记的，在探针与目标序列杂交的条件下使扩增产物与探针混合，所说的探针包括一种活性分子，该活性分子能够从荧光标记核苷酸吸收荧光或向其贡献荧光能量，及检测样品的荧光。

Virus particles was 20 icosahedron, a diameter of about 27 nanometer, without capsule, single-stranded nucleic acid RNA, is the hepatitis pathogen.

病毒粒子呈20面体，直径约27纳米，无被膜，核酸为单链RNA，是甲型肝炎的病原。

Contributions deal with the molecular aspects of genetic variation and evolution, mutation, gene action and regulation, immunogenetics, somatic cell genetics, and nucleic acid function in heredity and development, and with the biochemical aspects of genetic defects.

该杂志还介绍基因变异和进化、突变、基因作用和调控、免疫学、体细胞遗传学中的分子生物学，以及遗传发育中的核苷酸功能。

These flat-ringed planar compounds intercalate with the cells' nucleic acids .and act as frameshift mutagens and carcinogens.

这些平面扁平环形化合物能插入细胞的核酸中并且充当移码突变剂和致癌剂。

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％。