他们推断，沉默基因积累随机突变，最终使它们变得无用。
Silent genes accumulate random mutations, they reasoned, eventually rendering them useless.
但是，如果沉默基因在600万到1000万年内退化，那么失去已久的性状如何在更长的时间内被重新激活呢？
But if silent genes degrade within 6 to 10 million years, how can long-lost traits be reactivated over longer timescales?
RNA干扰技术已广泛应用于沉默基因表达的研究。
RNA interference (RNAi) is now established as a powerful tool to silence gene expression in a variety of organisms.
序列分析表明该基因含有芽孢杆菌特异的RBS序列，但没有功能性启动子，为沉默基因。
Sequence analysis revealed that the cry2Ab3 was a silent gene with the RBS sequence but lack of functional promoter.
一组称为多梳抑制复合物1（PRC1）蛋白质沉默基因必须先结合到特定的组蛋白上的甲基化位点。
A group of proteins called the polycomb repressive complex 1 (PRC1) that silences genes must first bind to a particular methylated address on a histone and.
在真核细胞，尽管一些转录活性基因和转录沉默基因的调控序列位置常常非常接近，它们的表达却并不互相影响。
In the eukaryotic cells, despite how close the regulation elements of active and inactive genes are frequently, they dot not affect each other expression level.
研究人员已经发明了精敏的新技术，来模拟化学药品，在紧密结合的沉默基因表达的DNA -蛋白复合体上做标记。
Researchers have devised clever new techniques to mimic the chemical marks on tightly wound DNA-protein complexes that silence gene expression.
研究人员已经发明了精敏的新技术，来模拟化学药品，在紧密结合的沉默基因表达的DNA -蛋白复合体上做标记。
Researchers have devised clever new techniques to mimic the chemical marks on tightly wound DNA-protein complexes that silence gene expression.
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