这些实验表明，FFC和外核体是组成转录后负调控反馈环路的组成部分。
Taken together, these results suggest that FFC and the exosome are part of a posttranscriptional negative feedback loop that regulates frq transcript levels and the circadian output pathway.
在NOS1基因启动子区鉴定了两个正调控区域和两个负调控区域，同时TS A可上调不同长度启动子的转录活性。
Two positive regulation regions and two negative regulation regions were found within NOS1 promoter. TSA may up-regulate the transcription activities of NOS1 promoters of different length.
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