intron

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Related to Introns: Exons

in·tron

(in'tron),
A portion of DNA that lies between two exons, is transcribed into RNA, but does not appear in that mRNA after maturation because the intron is removed and the exons spliced together, and so is not expressed (as protein) in protein synthesis. By customary usage, the term is extended to the corresponding regions in the primary transcript of mRNA before maturation.
[inter- + -on]

intron

/in·tron/ (in´tron) a noncoding sequence between two coding sequences within a gene, processed out in the formation of mature mRNA.

intron

(ĭn′trŏn)
n.
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.

intron

[in′tron]
Etymology: L, intra, within, regin, region
a sequence of nucleotides in eukaryotic DNA that does not code for amino acids and interrupts the coding sequence of a gene. Some genes contain numerous long introns. Compare exon.

in·tron

(in'tron)
A portion of DNA that lies between two exons, is transcribed into RNA, but does not appear in that RNA after maturation, and so is not expressed (as protein) in protein synthesis.

intron

A non-coding segment of a DISCONTINUOUS GENE. Introns are lengths of DNA interposed between coding segments (EXONS) in a gene and are transcribed into MESSENGER RNA but are then removed from the transcript and the exons spliced together. Introns do not contain biological information.

intron

or (‘in’ for intervening) - an intervening nucleotide sequence in an INTERRUPTED split gene. Such sequences are transcribed into primary RNA transcripts, but then excised from the RNA, leaving behind the EXON sequences for the functional gene product. See RNA PROCESSING, RNA SPLICING.

intron

untranslated, intervening sequences that are interspersed between coding sequences of a particular gene of almost all eukaryocytic genes and which are excised from the primary RNA transcript to yield mRNA.

intron-exon junction
introns are removed by the catalytic action of small nuclear riboproteins (snRNPs) which bind to special recognition sequences at the 5,(donor junction) and 3,(receptor junction) to form a complex called a spliceosome.
References in periodicals archive ?
Amplification of fragments containing intron 20 of OGT by PCR revealed a variation between the European and Chinese pig breeds.
Average Shannon entropy for each genomic feature [exon, intron, or untranslated region (UTR)] of HLA-A, HLA-B, and HLA-C was calculated by dividing the sum of Shannon entropy over the feature divided by the total length of the genomic feature.
Recently in another studies, three SNPs in exon 2 and flanking region and two SNPs in exon 3 and flanking introns in FCGRT gene in buffaloes were observed (18,19).
After DNA extraction, PCR for DMD was carried out with STR based linkage analysis at the introns 44, 45, 49 and 50 of DMD gene [19].
Characterization of nine taxa with details on exons length, introns length, total gene length, exon-intron ratios, exon and intron numbers, and length of coding and non-coding regions Taxa/Length (bp) E-1 I-1 E-2 I-2 E-3 H.
Determination of CpG islands in the introns of CD36 genes was conducted using the website http://www.
In one approach, primers that are reported to amplify introns in a wide range of species were taken from the literature, and were tested on clam DNA (Palumbi 1996, Jarman et al.
Spliceosome-excised introns are widely viewed as having evolved from self-splicing group II introns.
Herein, we describe the presence of DNA elements in intron 2 of the Ldh-B gene from F.
In plants, animals, and some other organisms, however, the genes are often interrupted by chunks of junk DNA called introns.
This porcine [beta]-casein gene consisted of nine exons and eight introns and was 11.