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upstream

   Also found in: Dictionary/thesaurus, Financial, Acronyms, Encyclopedia, Wikipedia 0.03 sec.
upstream
a term used in molecular biology to describe nucleotides of a nucleic acid molecule which lie in the 5′ direction from a particular reference point such as the site of initiation of transcription. See also downstream.

upstream activating site
DNA sequences that are upstream from the promoter and have a regulatory role in transcription.


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