: a polynucleotide sequence in a nucleic acid that codes information for protein synthesis and that is copied and spliced together with other such sequences to form messenger RNA compare intron
Examples of exon in a Sentence
Recent Examples on the Web
The researchers focused on a genetic element known as a poison exon.
—
Jenny Lehmann, Discover Magazine, 18 Mar. 2025
Most of the time, cells connect exons from the same pre-RNA molecule to make the mRNA.
—Bymitch Leslie, science.org, 24 Oct. 2024
Exondys 51 is used to treat the 13 percent of patients with disease caused by an error in the DNA sequence known as exon 51.
—BostonGlobe.com, 14 Dec. 2019
Exondys 51 is used to treat the 13% of patients with disease caused by an error in the DNA sequence known as exon 51.
—Damian Garde, STAT, 12 Dec. 2019
In one case, at Stanford, a toddler was diagnosed with two rare diseases, including a connective tissue disorder called Marfan Syndrome, after doctors conducted a form of sequencing that looks for changes in coded genetic segments known as exons.
—Anna Gorman, CNN, 8 May 2017
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Jenny Lehmann, Discover Magazine, 18 Mar. 2025
Most of the time, cells connect exons from the same pre-RNA molecule to make the mRNA.
—Bymitch Leslie, science.org, 24 Oct. 2024
Exondys 51 is used to treat the 13 percent of patients with disease caused by an error in the DNA sequence known as exon 51.
—BostonGlobe.com, 14 Dec. 2019
Exondys 51 is used to treat the 13% of patients with disease caused by an error in the DNA sequence known as exon 51.
—Damian Garde, STAT, 12 Dec. 2019
In one case, at Stanford, a toddler was diagnosed with two rare diseases, including a connective tissue disorder called Marfan Syndrome, after doctors conducted a form of sequencing that looks for changes in coded genetic segments known as exons.
—Anna Gorman, CNN, 8 May 2017
Cite this Entry
“Exon.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/exon. Accessed 9 Sep. 2025.
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