Transcription and RNA Processing

ID #1155

What is the signal in Eukaryotes that stops RNA processing?


Sometimes, the "stop" signal is just the absence of any additional "start" signals. For mRNA processing, when the cap is added, the tail is added, and all the introns have been recognized and removed, there's simply no more work to be done, and the mRNA is exported. So while there are no "stop" signals, you're not still working on anything, because these are finite tasks. Contrast this with transcription, when if you didn't have an explicit stop signal, you would just continue transcribing RNA far past where you need to, wasting energy all the time.

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