Shanxi Formation is a set of paralic continental deposit,of which,fluvial,swamp and lacustrine facies alternatively presented regularly.
山西一套近海型的陆相沉积,其中河流相、沼泽相及湖泊相有规律地交替出现。
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,新的基因本也可能透过反转录作用,将基因表现出来的mRNA反转录成DNA序,回基因内,这种现象称反转录移位(retrotransposition),发生在细胞内称长散布核因子(LINE)的转位子活动时。
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