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Robert J Winkfein1, Bret Pearson, Rebecca Ward

  • 1Department of Physiology and Biophysics, Faculty of Medicine, University of Calgary, 3330 Hospital Drive, NW, Alta., Canada T2N 4N1.

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The evolution of new genes is critical for speciation. Exon recombination, also known as exon shuffling or domain shuffling, is an important means of new gene formation. It is observed across vertebrates, invertebrates, and in some plants such as potatoes and sunflowers. During exon recombination, exons from the same or different genes recombine and produce new exon-intron combinations, which might evolve into new genes. 
Exon shuffling follows “splice frame rules.” Each exon has three reading...