Medical Dictionary


adv or adj down·stream \ˌdan-ˈstrēm\

Medical Definition of DOWNSTREAM

:  in the same direction along a molecule of DNA or RNA as that in which transcription and translation take place and toward the end having a hydroxyl group attached to the position labeled 3′ in the terminal nucleotide <a nucleotide sequence located downstream from the regulatory gene> <effects on the expression of downstream genes>—compare upstream


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