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原文連結
論文資訊
- 類型：已發表論文
- 日期：2008
摘要
Today, the reconstruction of the organismal 演化ary tree is basedmainly on molecular sequence data. However, sequence data are sometimes insufficient to reliably resolve in particular deep branches. Thus, it is highly desirable to find novel, more reliable types of 系統發育 markers that can be derived from the wealth of genomic data. Here, we consider the gain of introns close to older preexisting ones. Because correct splicing is impeded by very small exons, nearby pairs of introns very rarely coexist, that is, the gain of the new intron is nearly always associated with the loss of the old intron. Both events may even be directly connected as in cases of intron migration. Therefore, it should be possible to identify one of the introns as ancient ( plesiomorphic) and the other as novel ( derived
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