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A segment of a gene situated between exons that is removed before translation of messenger RNA and does not function in coding for protein synthesis.

[intr(agenic), occurring within a gene (intra- + genic) + -on.]


(Genetics) biochem a stretch of DNA that interrupts a gene and does not contribute to the specification of a protein. Compare exon2
[C20: from intr(agenic) (regi)on]


(ˈɪn trɒn)

a noncoding segment in DNA that interrupts a gene-coding sequence or nontranslated sequence. Compare exon.
[1975–80; perhaps intr (o)- + -on1]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.intron - sequence of a eukaryotic gene's DNA that is not translated into a protein
deoxyribonucleic acid, desoxyribonucleic acid, DNA - (biochemistry) a long linear polymer found in the nucleus of a cell and formed from nucleotides and shaped like a double helix; associated with the transmission of genetic information; "DNA is the king of molecules"
coding DNA, exon - sequence of a gene's DNA that transcribes into protein structures; "exons are interspersed with introns"
References in periodicals archive ?
Although the FMR1 CpG island is located in the 5' untranslated region of the gene, the FREE2 region is located within the translated portion that follows the ATG within exon 1, which qualifies FREE2 as an intragenic region bridging FMR1 exon 1 and intron 1.
In these cases, the Motor Chip was able to define breakpoint boundaries more precisely than previously used methods because of more accurate coverage of DMD intragenic regions (Table 2).