它还与核苷酸互换使用，尽管后者是由一个五碳糖、磷酸和一个碱基组成。
The term is also used interchangeably with “nucleotide” although the latter is composed of a five-carbon sugar joined to a phosphate group and one of the bases.
背景与目的：研究碱基切除修复基因XRCC1基因G28152A单核苷酸多态与肺癌风险的关系。
BACKGROUND&AIM: To evaluate the correlation between the single nucleotide polymorphism of XRCC1gene G28152A and the risk of lung cancer.
植物可以通过多种途径来修复紫外诱导的DNA损伤，主要包括光修复、碱基切除修复、核苷酸切除修复和重组修复等。
Plant could repair DNA damage induced by UV-B through many methods, mainly included light-repair, base excision repair, nucleotide excision repair and recombination repair etc.
核苷酸替换偏好性受其相邻碱基组成的影响现象已经在核基因组假基因序列和叶绿体基因组的非编码序列和编码序列中发现。
Influence of neighboring base composition on nucleotide substitution bias was observed in the sequence of nuclear pseudogenes and chloroplast non-coding and coding sequences.
遗传物质的多态性是基因功能调节的重要方式之一，基因编码区域单个核苷酸碱基的替换就可能改变蛋白质的结构和功能，对细胞或机体的生理功能产生重要影响。
Genetic Polymorphism is a important regulating type for the gene function, it can influence the protein structure and function by only change a single nucleotide in the coding region.
霍尔博士寻找了安慰剂效应强度和某些基因突变之间的联系，这些突变被称为“单核苷酸多态性”（SNPs），其基因中单个DNA的碱基“字母”序列发生改变。
Dr Hall looked for links between the placebo effect's strength and certain mutations, known as single nucleotide polymorphisms (SNPs), in which a single DNA "letter" in a gene is changed.
核苷的含氮碱基来自两种复合物，嘧啶和嘌呤。
The nitrogenous bases are derivatives of two parent compounds, pyrimidine and purine.
常见核苷酸中的碱基和戊糖是杂环化合物。
The bases and pentoses of the common nucleotides are heterocyclic compounds.
根据所得的酶切类型，计算了种间每核苷酸位点的平均碱基取代值P（遗传距离）。
We estimated the average number of nucleotide substitutions per site (genetic distance, P) among these species according to the cleavage patterns and Nei & Li's models(1979).
根据所得的酶切类型，计算了种间每核苷酸位点的平均碱基取代值P（遗传距离）。
We estimated the average number of nucleotide substitutions per site (genetic distance, P) among these species according to the cleavage patterns and Nei & Li's models(1979).
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