The non-coding (intervening) sequence of a gene that is transcribed into RNA but then excised by splicing to produce an mRNA transcript. Recently eukaryotic nuclear introns have been found to encode proteins.
the non-coding spaces between the exons (coding regions) of DNA in a gene myc gene-an oncogene which, when overexpressed and paired with another oncogene, triggers tumorous cell growth. This gene is found in both humans and mice and serves vital functions in normal cells. Oncogenes are designated by a three-letter abbreviation.
A non-coding section of DNA within a gene that is not translated to a peptide. Intervening sequences between exons. Introns are featured in the primary transcript (pre-mRNA) but removed by splicing during nuclear RNA processing/editing.
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. Introns are common in eukaryotes, but rarer in prokaryotes.
( intervening sequence) A DNA segment of a transcribed gene, the transcript of which is removed in the process of RNA maturation and, therefore, does not appear in the mature RNA molecule. Resides between exons.
Part of a primary transcript (or the DNA encoding it) that is removed by splicing during RNA processing and is not included in the mature, functional mRNA, rRNA, or tRNA; also called intervening sequence.
Non-coding parts of a gene that are 'edited out', and so do not contribute to making the final protein product of the gene. Introns are scattered between the exons of a gene. Their biological function is unknown.
A sequence of DNA within a gene that is initially copied into messenger RNA, but is cut out before the messenger RNA is translated and does not have a function in coding for proteins. in vitro fertilisation (IVF) Methods of carrying out fertilisation outside the body, frequently used to assist couples unable to conceive naturally.
The DNA base sequences interrupting the protein-coding sequences of a gene in genomic DNA; these sequences are transcribed into RNA but are cut out (spliced out) of the messenger RNA (mRNA) before it is translated into a protein molecule.
Segment of DNA, in eukayotes, which is interspersed among the protein-coding sequences (exons) in a gene. It is excised from the mRNA transcript in order to convert it into a mature messenger RNA molecule containing only coding sequences that can be translated into the amino acid sequence of a coded polypeptide.
Introns are portions of genomic DNA which ARE transcribed (and thus present in the primary transcript) but which are later spliced out. They are not present in the mature mRNA. Note that although the 3' flanking region is often transcribed, it is removed by endonucleolytic cleavage and not by splicing. It is not an intron.
a DNA sequence that interrupts the coding sequences (exons) for a gene product. After information from the genes is transcribed into new strands of hnRNA, the introns are spliced out of the RNA molecule, and are not represented in the mature mRNA. Although the functions of introns are unknown, it has been postulated that some introns have a role in regulating gene expression.
A non-coding sequence of DNA within a gene that must be spliced out of a primary transcript to yield a mature, translatable mRNA (see Exon). Intron sequences do not appear in the translated polypeptide.
Part of a gene that is initially transcribed into the primary RNA transcript but then removed from it when the exon sequences on either side of it are spliced together. Also called an intervening sequence.
Noncoding portion of the gene that is spliced out from the nascent RNA transcript in the process of making an mRNA transcript. Frequently includes regulator elements (i.e. binding sites) in addition to those of the promoter.
the parts of the DNA sequence that interrupt the protein coding sequence, therefore often referred to as "non-coding regions." This part of the DNA sequence is transcribed into RNA, but cut out before the protein sequence is translated.
These are interspersed with introns, longer sections of "extra" or "nonsense" DNA. (IOCeleraGenome)Íntron Os segmentos removidos da molécula do RNA mensageiro correspondem a trechos do gene chamados íntrons; os segmentos que restam se chamam exons. (POFapesp3)
A segment of RNA transcript that is edited out by the cell and that stays in the nucleus. Introns appear to have a role in controlling gene expression in eukaryotes. Prokaryotes do not have introns. Contrast exon. on. An atom or molecule with an unequal number of protons and electrons. Thus the atom or molecule has either a net positive or a negative charge.
a block of DNA within a gene not encoding a protein. Edited, spliced, out during transcription into mRNA. Originally thought not to contain any information, but more and more this appears not to be the case. Some intron sequences have been shown to regulate gene expression during development (eg c elegans, Lin 14)
a length of DNA which is interspersed among the protein-coding sequences ( exons) in a gene. Introns are transcribed (see transcription) into mRNA but are then cut out of the mRNA sequence before protein synthesis occurs. See splicing.
Region of DNA which generates that part of precursor RNA which is spliced out during transcription and does not form mature mRNA and therefore does not specify the primary structure of the gene product.
Introns are sections of DNA colinear to the RNA sequence that will be spliced out after transcription, but before the RNA is translated. Introns are common in eukaryotic RNAs of all types, but are found in prokaryotic tRNA and rRNA genes only. The regions of a gene that remain in spliced mRNA are called exons.