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Evolution
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Because group II introns are considered the ancestors of spliceosomal introns, it is likely that they would have been present in nuclear genomes of the earliest eukaryotes. Therefore, it has been proposed that group II introns might also be ancestors of non-LTR elements (LINE-like elements).
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| Introduction | Intron secondary structure | Intron ORF structure | Introns listed by organism | Bacterial intron fragments | Alignment of insertion sequence |
| Phylogenetic tree of intron ORFs | How to find group II intron | Site map | Contact us |
