The origin of recent introns: transposons?
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Genome Biology 2004, 5:251 doi:10.1186/gb-2004-5-12-251Published: 29 November 2004
The long-standing question of how genes acquire introns has provoked much debate. A recent study makes considerable progress by identifying numerous recently gained introns in nematodes - although it remains difficult to distinguish definitively between models of intron gain.