Histones are characterized by numerous posttranslational modifications that influence gene transcription.
组蛋白的特点是大量的翻译后修饰,这些修饰可以影响基因录。
Alternatively, a new version of a gene can also be created through reverse transcription: during gene expression, the mRNA is copied back into a sequence of DNA that is inserted into the genome.
其二,新的基因复本也可能透过反录作用,将基因表出来的mRNA反录成DNA序列,再插回基因组内,这种象称为反录移位(retrotransposition),在细胞内称为长散布核因子(LINE)的位子活动时。
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