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: 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
Example Sentences
Recent Examples on the Web But some of the intron RNA can get turned into small RNAs that are involved in protein production. 
Quanta Magazine, 1 Sep. 2021 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 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 Forty percent of these sites, however, were in between genes; another 47 percent were in introns, parts of a gene that aren't used to encode a protein. John Timmer, Ars Technica, 8 Nov. 2017 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
Quanta Magazine, 1 Sep. 2021 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 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 Forty percent of these sites, however, were in between genes; another 47 percent were in introns, parts of a gene that aren't used to encode a protein. John Timmer, Ars Technica, 8 Nov. 2017 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 Word History
Etymology
intervening sequence + -on entry 2
First Known Use
1978, in the meaning defined above
Time Traveler
The first known use of intron was in 1978 👨🏻🏫 Mr. Ng 韋氏詞典 📚 – mw.mister5️⃣.net
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