: a polynucleotide sequence in a nucleic acid that does not code information for protein synthesis and is removed before translation of messenger RNA compare exon
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Moreover, the mystery around the origins of introns only deepens in light of the extreme variation in where introns tend to show up throughout the eukaryote tree of life.
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Jake Buehler, Quanta Magazine, 30 Mar. 2023
There are now about a dozen individual changes in the amino acids used to make the protein, and the nearby DNA has picked up both an insertion (an intron) and several deletions.
—John Timmer, Ars Technica, 23 Feb. 2018
Named for parts of genes called introns and exons, Intrexon was founded in 1998 by Thomas D. Reed and his wife, Jackie, to supply DNA constructs for research with genetically engineered mice.
—Andrew Pollack, New York Times, 5 Mar. 2016
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Jake Buehler, Quanta Magazine, 30 Mar. 2023
There are now about a dozen individual changes in the amino acids used to make the protein, and the nearby DNA has picked up both an insertion (an intron) and several deletions.
—John Timmer, Ars Technica, 23 Feb. 2018
Named for parts of genes called introns and exons, Intrexon was founded in 1998 by Thomas D. Reed and his wife, Jackie, to supply DNA constructs for research with genetically engineered mice.
—Andrew Pollack, New York Times, 5 Mar. 2016
Cite this Entry
“Intron.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/intron. Accessed 15 Sep. 2025.
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