(redirected from Exons)
Also found in: Thesaurus, Medical, Encyclopedia.
Related to Exons: RNA splicing


A nucleotide sequence that is found in a gene, codes information for protein synthesis, and is transcribed to messenger RNA.

[ex(pressed) + -on.]

ex·on′ic adj.


(Historical Terms) Brit one of the four officers who command the Yeomen of the Guard
[C17: a pronunciation spelling of French exempt exempt]


(Genetics) any segment of a discontinuous gene the segments of which are separated by introns. Compare intron
[C20: from ex-1 + -on]
exˈonic adj


(ˈɛk sɒn)

a segment of DNA that is transcribed to RNA and specifies the sequence of a portion of protein.
[1975–80; ex(pressed sequence) + -on1]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.exon - sequence of a gene's DNA that transcribes into protein structures; "exons are interspersed with introns"
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"
intron, noncoding DNA - sequence of a eukaryotic gene's DNA that is not translated into a protein
References in periodicals archive ?
Primers for exons (2, 3) were designed from intron exon boundaries of approximately 100bp sequence of c-Myc gene by primer 3 and Net primer software (Table I) and manufactured by Advance Bioscience International.
Sarepta will also make certain additional regulatory and commercial milestone payments for exons 51, 45, 53 and probably on other exon-skipping products to be developed in the future.
Mutation screening of all exons and exon-intron boundaries was performed by Sanger sequencing, and mini haplotype analysis was carried out by genotyping of Short Tandem Repeat (STR) and Variable Number Tandem Repeat (VNTR) alleles.
The most common mutations are found in exons 3, 4 of this gene.
The BDNF gene has a complicated structure with eight 5' noncoding exons (I-IXa), each of which can splice to a common coding exon (IX) to form a functional transcript.
In this study, terminal exons 38 to 42, including TE domain were explored for the presence of SNP variations using polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) method.
Where there is a selection of different versions of exons, the cell may choose from among them in a targeted manner.
Antisense oligonucleotide mediated exon skipping targets DMD pre-mRNA to induce skipping of specific exons and restore the open reading frame.
The primers were intended to amplify seven fragments corresponding to all the four exons (full coding regions) and three introns (partial noncoding regions) of [beta]2M gene in buffalo.
In a previous study [6] we observed age-dependent alternative splicing of MS mRNA in postmortem human cortex, resulting in deletion of exons contributing to the methylfolate-binding domain, as well as a portion of the cap domain, which normally protects Cbl from oxidation [1,7].
Mutations cluster within "hot spot" exons 9, 11, 13, 17 in KIT and exons 12, 14, 18 in PDGFRA (Figure 2).
The coding exons and flanking regions of 101 known deafness genes, as well as 3 mitochondrial DNA and 3 microRNA regions, were target-enriched as previously described.