Introns, derived from the term "intragenic regions", are non-coding sections of DNA. Once a DNA sequence has been transcribed as a hnRNA strand, the introns will be spliced out. The resulting mRNA sequence will then be translated into a protein.
intron
nucleotide sequences in nuclear RNA that are eliminated during the formation of mRNA; also called intervening sequences
Source: Jenkins, John B. 1990. Human Genetics, 2nd Edition. New York: Harper & Row ...
Intron
Introns are sequences removed by the process called splicing.
Related ...
Intron
An intron is a portion of a gene that does not code for amino acids. In the cells of plants and animals, most gene sequences are broken up by one or more introns.
Self-splicing intron that does not require an external nucleotide for splicing; releases the intron in a lariat form.
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ...
intron In eukaryotes, bases of a gene transcribed but later excised from the mRNA prior to exporting from the nucleus and subsequent translation of the message into a polypeptide. PICTURE ...
Intron
A sequence of a gene which is transcribed but which is excised by a splicing reaction before the mature mRNA is translated. Found in Eukarya, Archae, Bacteria, eukaryotic viruses, and phage.
intron
A noncoding, intervening sequence within a eukaryotic gene.
invagination ...
intron A segment of DNA in a gene that is transcribed but removed from the transcript by splicing together exon sequences from either side of the intron.
Intron A part of the gene which is transcribed but which is removed (by the process of splicing) from the primary transcript in the formation of mRNA. Introns therefore remain in the nucleus.
intron - "intervening sequence," a stretch of nucleic acid sequence spliced out from the primary RNA transcript before the RNA is transported to the cytoplasm as a mature mRNA; ...
Intron. A noncoding DNA sequence within a gene that is initially transcribed into messenger RNA but is later snipped out. See Coding, DNA, Messenger RNA, Transcription.
Introns of ancient origins
This is number 13 in my series of postings about current research in evolution. I'll summarize two papers from a recent issue of Science, both of which basically reported the same finding.
Intron DNA sequence that interrupts the protein-coding sequence of a gene; an intron is transcribed into RNA but is cut out of the message before it is translated into protein.
See also: exon ...
Introns Regions of the primary transcript that are removed in the mature mrna. Also called intervening sequences.
Inversion A nucleotide sequence whose normal order is reversed in a gene or in a chromosome.
Exon - intron boundary: Introns end with the dinucleotide ApG [3' splice site / acceptor] and start with the dinucleotide GpT [5' splice site / donor].
Making Intron-Free DNA:
The DNA of eukaryotes is extremely long, containing many thousands of genes. It is often not possible to find specific genes in the DNA. Artificial genes can be made, however, using mRNA.
Intron
The DNA base sequence interrupting the protein-coding sequences of a gene; intron sequences are transcribed into RNA but are cut out of the message before it is translated into protein.
Intron boundary skidding
Situation (known are three so far, January 2002) whereupon a genomic AGCAG pentamer offers adjacent, ...
Intron
- A non-coding nucleotide sequence in eukaryotic DNA, separating two portions of nucleotide sequences found to be contiguous in the mRNA; also called intervening sequence.
In vitro ...
introns can be moved to new locations within the gene.
E.
the disruption of a gene on the plasmid by the inserted recombinant DNA.
intron An intervening or noncoding segment of a gene; introns separate exons.
introvert A tubular, eversible extension of the head, bearing the mouth at its tip.
invagination An infolding of a layer of tissue to form a sac-like structure.
INTRON - Intervening sequences in eukaryotic genes which do not encode protein but which are transcribed into RNA. Removed from pre-mRNA during nuclear splicing reactions.
Intron: Introns are portions of genomic DNA which ARE transcribed (and thus present in the primary transcript) but which are later spliced out. They thus are not present in the mature mRNA.
The introns in most pre-mRNAs begin with a GU and end with an AG. Presumably these short sequences assist in guiding the spliceosome.
Visual Evidence ...
Mutations in the introns can prevent splicing and thus prevent protein biosynthesis.
In many cases, the splicing process can create many unique proteins from a large collection of exons. This phenomenon is called alternative splicing.
The situation is more complicated for eukaryotic genes, which often contain one or more noncoding regions (introns). To find ORFs in these genes, the introns are removed in a process called splicing (Fig. 3).
Most, but not all structural eukaryote genes contain introns. Although transcribed, these introns are excised (cut out) before translation (a seemingly energy inefficient process).
Introns Sequences of non-coding bases found in eukaryotic genes. They may make up a large proportion of the total gene length. Introns are spliced out of the RNA transcript during its processing to mRNA.
kbp kilobase pairs.
Introns (Non-coding) and exons (coding) DNA sequences are present in the primary mRNA transcript. Introns are removed before the mRNA is translated so that exons are only present in the mature mRNA transcript ...
RNA splicing - RNA-processing step in which all of the intron sequences are removed and exon sequences are kept therebv producing a much shorter RNA molecule.
second law of thermodynamics - the degree of disorder in the universe can only increase ...
A region of a gene that is present in the final functional transcript (mRNA) from that gene. Any non-intron section of the coding sequence of a gene; together the exons constitute the mRNA and are translated into protein.
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Introns (← links)
Gluts (← links)
Digger (← links)
Degenerates (← links)
Degrades (← links)
Restorations (← links)
Prostaglandin (← links)
Pepsin (← links)
Chylomicrons (← links)
Split gene (← links) ...
Introns -- a segment of DNA (between exons) that is transcribed into nuclear RNA, but are removed in the subsequent processing into mRNA.
 See also: Sequence, Protein, DNA, Trans, Gene
  
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