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exon
(redirected from Expressed region)

    Also found in: Encyclopedia, Wikipedia, Hutchinson 0.02 sec.
exon /ex·on/ (ek´son) the coding region in a gene.
ex·on (ksn)
n.
A nucleotide sequence in DNA that carries the code for the final mRNA molecule and thus defines a protein's amino acid sequence. Also called coding sequence.
ex·onic adj.
exon
[ek′son]
Etymology: Gk, exo + genein, to produce
the part of a DNA molecule that contains the code for the final messenger RNA. Compare intron.
exon
regions of a primary RNA transcript in eukaryotic cells that are coding and are joined together when introns are spliced-out, to make the functional mRNA.


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