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A segment of a DNA or RNA molecule that does not code for proteins and interrupts the sequence of genes.Compare with exon
- ‘The second insertion traps an exon of a different gene contained in an intron of the former gene.’
- ‘The coding region is interrupted by several synthetic introns to improve gene expression.’
- ‘First, many heterochromatic genes have large introns relative to the genome as a whole.’
- ‘This finding is the first suggestion that multiple spliceosomal introns occur in ribosomal genes.’
- ‘This exception may be the result of this region corresponding to a small intron in the Drosophila gene.’
1970s: from intra- within + -genic + -on.
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The definitions of ‘buddy’ and ‘bro’ in the OED have recently been revised. We explore their history and increase in popularity.