碱基替换 [
jiǎn jī tì huàn]
[化学] base substitution
- 序列分析显示了一个低水平的多样性(0.31%),其中主要发生的是单碱基的替换。
Sequence analysis indicated a low level of variation (0.31%), with single base substitutions being predominant. - 在这些多态性变异位点中,出现在遗传密码子第一和第二位上的碱基替换率分别为36.76% 和35.29%。
Among the polymorphic sites, the nucleotide substitutions in the first and second positions of the codons accounted for 36.76% and 35.29%, respectively. - 人与人之间多数的基因差异,是以单核苷酸多型性(SNP)的形式出现;那是DNA上单一个碱基遭到替换所造成的。
Most genetic differences in people probably take the form of single nucleotide polymorphisms, or SNPs (pronounced "snips"), in which a single DNA letter substitutes for another.
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