mechanism for introns acting as regulatory elements?

[sixpence]

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can someone explain how introns can turn up transcription of some genes? do they do this before being spliced out or after?

 

[wanderer]

can someone explain how introns can turn up transcription of some genes? do they do this before being spliced out or after?

Where does transcription happen? (DNA or RNA) This automatically answers your second question. I don't really have the answer to your first question.