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introns' - 2 dictionary results
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in·tron     (ĭn'trŏn)  Pronunciation Key 
n.   A segment of a gene situated between exons that is removed before translation of messenger RNA and does not function in coding for protein synthesis.


[intr(agenic), occurring within a gene (intra- + genic) + -on1.]

The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2006 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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intron   (ĭn'trŏn)  Pronunciation Key 
A segment of a gene situated between exons that does not function in coding for protein synthesis. After transcription of a gene to messenger RNA, the transcriptions of introns are removed, and the exons are spliced together by enzymes before translation and assembly of amino acids into proteins. Compare exon.

The American Heritage® Science Dictionary
Copyright © 2002 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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