录
[
用]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
因复本也可能透过反
录
用，将因表现出来的mRNA反录成DNA序列，再插回因组内，这种现象称为反录移位（retrotransposition），发生在细胞内称为长散布核因子（LINE）的位子活动时。
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