碱基在化学中本是“碱性基团”的简称。有机物中大部分的碱性基团都含有N(氮)原子,称为含氮碱基,氨基(-NH2)是最简单的含氮碱基。 碱基,在生物化学中又称核碱基、含氮碱基,是形成核苷的含氮化合物,核苷又是核苷酸的组分。碱基、核苷和核苷酸等单体构成了核酸的基本构件。 核碱基间可以形成碱基对,且彼此堆叠,所以,它们是长链螺旋结构,例如核糖核酸(RNA)和脱氧核糖核酸(DNA)的重要组成部分。
Sequence analysis showed that the start codon was could not find, this may be caused by mistaken sequencing or base losting.
序列分析发现,没有起始密码子,可能是测序错误或碱基缺失造成的。
参考来源 - 番木瓜若干果实成熟相关基因克隆及遗传转化的研究RLSCS discriminated complementary target DNA and single-base mismatch DNA through the diffusion time and intensity of scattering light from GNPs.
用单个碱基错配的靶目标DNA加入到体系中,发现其扩散时间和散射光强度也相应的增加,但与完全互补的靶目标DNA相比,其增加的程度要弱一些。
参考来源 - 纳米金共振散射相关光谱及其应用·2,447,543篇论文数据,部分数据来源于NoteExpress
先导链与滞后链编码序列的碱基使用频率基本一致。
There is same bases usage frequency in coding sequence between leading strand and lagging strand.
无碱基位损伤可作为诱导性易错修复功能的靶损伤。
Apurinic sites are the proper substrates of the inducible error-prone repair activity.
The pasting back together occurs partly naturally by this process of hybridization, but hybridization only re-establishes the base pairing.
片段和载体的重新粘合一定程度上,是通过杂交自然发生的,但杂交只能重建碱基配对
Because it takes three units where there's only four choices at each position to have at least 20 unique combinations.
因为每个位点上仅有四种可能性,只有采用三个碱基一组,才能取得至少二十种不同的组合方式
We talked about base pairing and how that leads to this process of hybridization or very specific matching between complimentary strands.
我们讲了碱基配对,以及它们如何引起杂交过程,或者说,互补链之间的特异配对
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