Any area away from a gene, but on the same strand of DNA, that is located past the gene if one moves along the strand in a 5'-3' direction (the normal direction of transcription and leading strand replication).

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From the BioTech Dictionary at http://biotech.icmb.utexas.edu/. For further information see the BioTech homenode.

Down"stream` (?), adv.

Down the stream; as, floating downstream.

 

© Webster 1913.