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.
唯一的区别在于，在RNA复制中，胸腺嘧啶被密切联系的、常被缩写为U的碱基尿嘧啶替换。
The only difference is that in the RNA copy, thymine is replaced with the closely related base uracil, commonly abbreviated u.
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.
序列分析发现水牛中该外显子的第109位碱基处有C〉T替换，为沉默突变，与泌乳性状之间无显著相关性。
The e4. 109 CT substitution was detected in nine swamp buffalo populations, and it was a silent mutation and was not associated with the traits of milk yield in buffalo.
序列分析发现水牛中该外显子的第109位碱基处有C〉T替换，为沉默突变，与泌乳性状之间无显著相关性。
The e4. 109 CT substitution was detected in nine swamp buffalo populations, and it was a silent mutation and was not associated with the traits of milk yield in buffalo.
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