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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 ?
There were some differences in distribution in the European countries, but by far the most common mutation (35%) was at the intron-exon junction of exon 8, with p.
Owing to the remarkable similarities of phenotype in our subject with the Grebe syndrome, the index subject and his unaffected father were screened for the presence of any pathogenic mutation in the entire coding portion and intron-exon junctions of the CDMP1 gene.
We extracted genomic DNA from whole blood and performed PCR amplification of 14 coding exons of the albumin gene and their intron-exon junctions (12) as previously described (7).