(in Britain) one of four yeomen of the guard who act as commanding officers in the absence of higher authority.
- Also called exempt.
Other definitions for exon (2 of 2)
any portion of an interrupted gene that is represented in the RNA product and is translated into protein.
- Compare intron.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use exon in a sentence
As introns are removed during splicing, one exon also gets axed from the resulting SMN2 RNA—exon 7.
Scientists took a few hundred thousand random molecules and tested each one in cells to see which ones increase SMN2 exon 7 splicing.
Although the final drug, Evrysdi, is safe and effective, scientists are still debating how it functions at the molecular level—in particular, how it singles out SMN2 exon 7 among the vast number of other exons.
The cell then snips out these extraneous bits, leaving only exons to form mature RNA that can make proteins.New ‘Universal Switch’ Lets Scientists Fine-Tune Gene Therapy | Shelly Fan | August 3, 2021 | Singularity Hub
In 1837 he was appointed exon of the Yeomen of the Guard, which he held up to 1849.Norfolk Annals | Charles Mackie
exon librum istum cum pari suo, in festo Annuntiationis Dominice.Old English Libraries | Ernest Savage
But, it will be seen, the 'tenuit' of Domesday is equated by the 'emit' of the exon book.
We have not seen dominicum used as a substantive; but in the exon.Domesday Book and Beyond | Frederic William Maitland
I do not believe that there could be found under heaven another man like this exon.A Popular History of France From The Earliest Times | Francois Pierre Guillaume Guizot
British Dictionary definitions for exon (1 of 2)
British one of the four officers who command the Yeomen of the Guard
British Dictionary definitions for exon (2 of 2)
any segment of a discontinuous gene the segments of which are separated by introns: Compare intron
- exonic, adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Scientific definitions for exon
A segment of a gene that contains information used in coding for protein synthesis. Genetic information within genes is discontinuous, split among the exons that encode for messenger RNA and absent from the DNA sequences in between, which are called introns. Genetic splicing, catalyzed by enzymes, results in the final version of messenger RNA, which contains only genetic information from the exons. Compare intron.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Cultural definitions for exon
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.