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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.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(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]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈɪn trɒn)

a noncoding segment in DNA that interrupts a gene-coding sequence or nontranslated sequence. Compare exon.
[1975–80; perhaps intr (o)- + -on1]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
Only variants in the coding region and flanking intronic regions with a minor allele frequency <1% were evaluated.
Whole genome sequencing (WGS) can sequence the entire genome--both the coding (exonic) and noncoding (intronic) regions--while exome sequencing analyzes only the protein-coding exons, which make up 1% to 2% of the genome and about 85% of the protein-coding genes associated with known human disease.
The longevity SNP rs2802292 uncovered: HSF1 activates stress-dependent expression of FOXO3 through an intronic enhancer.
The entire coding region (exons 1-8) and splice sites in flanking intronic regions of AR gene were polymerase chain reaction (PCR) amplified and sequenced by automated analysers (6).
This position falls in the intronic region, 158 nucleotides backwards from the initiation point.
The 9 tagger SNPs included 6 intronic SNPs, 2 missense SNPs, and 1 unknown SNP.
All exonic regions of the MLH1 and MSH2 genes, including flanking intronic boundaries, were amplified using previously reported primers and then sequenced using the 3500 Dx Genetic Analyzer (10).
Sequencing of DNA samples: PCR products sent for sequencing returned in FASTA files formats and chromatograms of the BRCA1 exon 2 coding sequence of 99 base pairs, along with intronic flanking regions on both 3' and 5' ends.
Most of the observed cancer samples are heterozygous in intronic regions of this gene.
Lenalidomide modulates gene expression in human ABC-DLBCL cells by regulating IKAROS interaction with an intronic control region of SPIB.
CircRNAs often consist of exons (exonic circRNAs), but they can also arise from introns (intronic circRNAs or circular intronic RNAs) [4].
Sequencing analysis of all coding exons and flanking intronic sequences was performed.