The epigenome is a molecular marking system that controls gene expression without altering the DNA sequence.

Image credit: Dreamstime观基是在不改变DNA序列的前提下控制基的分子标记系统。

Furthermore, PTP1B deletion significantly reduced gene expression of 3 1-adrenergic receptor subtypes, consistent with blunted constriction to phenylephrine.

此外PTP1B缺乏明显减少31-肾上腺受体亚型基，与对苯福林收反应迟钝有关。

This kidney atlas allowsa comprehensive analysis of the progression of gene expression states during nephrogenesis, as well as discovery of potential growth factor-receptor interactions.

图谱使得全面分析肾脏发生过程中基状态的发展变得，此之外，作者示它还有助于发现潜在的生长子-受体相互作用。

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，新的基复本也透过反转录作用，将基现出来的mRNA反转录成DNA序列，再插回基组内，这种现象称为反转录移位（retrotransposition），发生在细胞内称为长散布核子（LINE）的转位子活动时。