ExpertGlossary

• A noncoding DNA sequence within a gene that is initially transcribed into messenger RNA but is later snipped out. See Coding, DNA, Messenger RNA, Transcription.
  Susan Allender-Hagedorn and Charles Hagedorn - Cite This Source - This Definition
• A segment of the primary transcript of a eukaryotic gene, removed (before the mature mRNA is translated) in a process known as intron splicing. Some eukaryotic genes contain a large number of introns, which make up the bulk of the DNA sequence of the gene. Introns are also found in genes whose RNA transcripts are not translated, namely eukaryotic rRNA and tRNA genes. In these cases the intron sequence does not appear in the functional RNA molecule. Synonym: intervening sequence.
  UN Food and Agriculture Organization - Cite This Source - This Definition
• Browse Related Terms: conservation, editing, Exon, intervening sequence, splicing, splicing junction, split gene

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