Lexic.us

Definition of Intron

1. Noun. Sequence of a eukaryotic gene's DNA that is not translated into a protein.

Definition of Intron

1. Noun. (genetics) A portion of a split gene that is included in pre-RNA transcripts but is removed during RNA processing and rapidly degraded. ¹

¹ Source: wiktionary.com

Definition of Intron

1. an intervening sequence in the genetic code [n -S]

Medical Definition of Intron

1. A noncoding sequence of DNA within a gene, that is transcribed into hnRNA but is then cut out of the message by RNA splicing in the nucleus, leaving a mature mRNA that is then translated in the cytoplasm. Introns are poorly conserved and of variable length, but the regions at the ends are self complementary, allowing a hairpin structure to form naturally in the hnRNA, this is the cue for removal by RNA splicing. Introns are thought to play an important role in allowing rapid evolution of proteins by exon shuffling. Genes may contain as many as 80 introns. Compare: exon (14 Oct 1997)

Lexicographical Neighbors of Intron

Literary usage of Intron

Below you will find example usage of this term as found in modern and/or classical literature:

1. Life-Cycle Assessment in Building and Construction by Shpresa Kotaji, Agnes Schuurmans, Suzy Edwards (2003)
"intron. 1997. Vergelijking van milieueffecten van de winning van ... intron. 1999. LCA van Casco's in beton Een vergelijking tussen een ..."

2. A Lifelong Passion: Nicholas and Alexandra: Their Own Story by Andrei Maylunas (2005)
"The intron-containing plasmid increased the level of GUS enzyme activity 10 to-fold and 80 to 90-fold compared with the intronless plasmid, ..."

3. Biotechnology of Algae: A Bibliography by Virginia Stone (1992)
"Using both direct primer extension cDNA sequencing and cDNA cloning and sequencing, we have determined that a 618 nt internal intron is first excised from ..."

4. Transposable Elements in Plants: Sponsored CRIS/ICAR Projects and Bibliography by Andrew Kalinski (1995)
"CC:F200 AB: Transposable element (TE) insertion into or near plant introns can cause intron skipping and alternative splicing events, resulting in reduced ..."

5. Biotechnology: Ti-Plasmids and Other Plant Vectors: Bibliography January by Lara Wiggert (1995)
"Using both direct primer extension cDNA sequencing and cDNA cloning and sequencing, we have determined that a 618 nt internal intron is first excised from ..."

6. Gene Expression in Field Crops: Bibliography January 1991-November 1992 edited by Janet Saunders, Robert D. Warmbrodt (1995)
"The nonsense suppressor tRNA(Tyr) genes were efficiently transcribed in HeLa and yeast nuclear extracts, however, intron excision from all mutant ..."

7. Gene Expression in Algae and Fungi Including Yeast: Bibliography January by Janet Saunders, Robert D. Warmbrodt (2001)
"... levels in vitro due to inefficient splicing of the intron-containing pre-tRNAs. ... and yeast nuclear extracts, however, intron excision from all mutant ..."

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