intron
From intervening sequence region; originally defined as a non-coding polynucleotide sequence that interrupts the coding sequences, the exons, of a gene. More recent evidence indicates that, in some cases, introns may also be translated, so a more cautious definition of an intron is merely a DNA sequence whose transcribed sequence is physically separated from that of exons during RNA processing. (see also spliceosome)Moore, M.J. (1996) Nature (London) 379, 402-403
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