V2EX stop codon

STOP CODON

释义 Definition

终止密码子:mRNA 上指示核糖体停止翻译、结束蛋白质合成的三联核苷酸序列。常见的终止密码子有 UAA、UAG、UGA(也常被称为 nonsense codons)。

发音 Pronunciation (IPA)

/stp kodn/

例句 Examples

A stop codon tells the ribosome to end translation.
终止密码子会告诉核糖体结束翻译过程。

If a mutation creates a stop codon too early, the protein may be truncated and lose its function.
如果突变过早地产生终止密码子,蛋白质可能会被截短,从而丧失功能。

词源 Etymology

stop 意为“停止”,codon 来自 code(编码)加上表示单位的后缀 -on,指遗传信息中的“三联编码单位”。合起来 stop codon 就是“让编码过程停止的密码子”,用于标记蛋白质合成的终点。

相关词 Related Words

文学与著作中的用例 Literary Works

  • Molecular Biology of the Cell(《细胞的分子生物学》)
  • Molecular Cell Biology(《分子细胞生物学》)
  • Genes(Benjamin Lewin,《基因》)
  • The Selfish Gene(Richard Dawkins,《自私的基因》;在讲解遗传信息与蛋白质合成的相关语境中常出现)
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