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Related to Introns: Exons


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 ?
As an initial step to investigate variations in OGT between European and Chinese pig breeds, attempts were made to amplify across several relatively short introns and a polymorphism was identified due to an inserted element in intron 20 of OGT [15].
The complete, fully characterized sequence of each identified novel HLA gene, stretching from the 5' end of exon 1 through the 3' end of the last exon (exon 7 of HLA-B and exon 8 of HLA-A and HLA-C including all encompassed introns were submitted to GenBank and the WHO HLA Nomenclature Committee for factors of the HLA system.
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 adult mice brains, where FTO was thought to affect metabolic function, they discovered that the promoter that turns on FTO did not interact with obesity-associated FTO introns.
By analysing the structure of eukaryotic genes it is possible to identify two different sequence types: those that are present in the mature transcript or mRNA, called exons, and those that are not present, called introns.
Human genes are composed of exons and interrupted by introns that must be removed by splicing to create a translatable mRNA.
At the Stanford Molecular Pathology Laboratory, the CFTR gene sequencing assay covers 983 bases of the 5' untranslated region, exons 1 to 24 (24 exons by conventional legacy nomenclature, which includes 27 factual exons), at least 20 bases into the 5' and 3' ends of all introns, the CFTR poly T and TG tracts in intron 8, intron 19 surrounding the c.
Materials and Methods: PCR for Duchenne Muscular Dystrophy was carried out with STR based linkage analysis at introns 44, 45, 49 and 50 of DMD gene .
After students complete the tutorial, they will find that, although the beta hemoglobin proteins of humans and chimpanzees are identical, the genes that code for these proteins differ by one base pair in the exons (which code for proteins) and by 15 base pairs in the introns (which do not code for proteins).
troglodytes, two introns were seen due to the presence of a non-coding exon (97% redundant).
Results: Differential distribution in number and length of exons and introns was detected in CD36 gene across seven taxa.
ABSTRACT We have designed a set of exon-primed intron-crossing (EPIC) PCR primers to amplify introns at the genes TBP and SRP54 in the Manila clam (Ruditapes philippinarum) and the grooved carpet-shell clam (R.