Intron

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  • the DNA sequence in a eukaryotic gene that is not translated into a protein.
    Source: Anthromorphemics
  • 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
  • A noncoding DNA sequence within a gene that is initially transcribed into messenger RNA but is later snipped out.
  • 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. The parts of the gene sequence that are expressed in the protein are called exons, because they are expressed, while the parts of the gene sequence that are not expressed in the protein are called introns, because they come in between the exons.


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