Intron
Intron
Intron (/ˈɪntrɒn/), also known as intervening sequence, is a segment of a DNA or RNA molecule that does not code for proteins and interrupts the sequence of genes.
Etymology
The term "intron" is derived from the term "intragenic region", which is a region inside a gene. It was coined in 1978 by American biochemist Walter Gilbert.
Definition
Introns are non-coding sections of an RNA transcript, or the DNA encoding it, that are spliced out before the RNA molecule is translated into a protein. They are located in the genes of most organisms and many viruses.
Function
Introns play various roles in the body. They can influence the expression of genes, contribute to the diversity of proteins, and have a role in the evolution of the genome.
Related Terms
- Exon: A segment of a DNA or RNA molecule containing information coding for a protein or peptide sequence.
- Splicing: The process of removing introns and joining exons together.
- Gene expression: The process by which information from a gene is used in the synthesis of a functional gene product.
See Also
External links
- Medical encyclopedia article on Intron
- Wikipedia's article - Intron
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