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转录作用,将基因表
出来的mRNA
转录成DNA序列,再插回基因组内,这种
象称为
转录移位(retrotransposition),发生在细胞内称为长散布核因子(LINE)的转位子活
。