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<p>serve as inputs, and the output of the module is the command given to the transcription machinery, which in turn determines the rate of gene transcription or whether it is <a href="page.php?w=Enhancer_%28genetics%29">turned on</a> or <a href="page.php?w=Gene_silencing">off</a>. There are two types of transcription factor inputs: those that determine when the target gene is to be expressed and those that serve as functional drivers, which come into play only during specific situations during development. These inputs can come from different time</p><p>
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