期刊
JOURNAL OF MOLECULAR EVOLUTION
卷 63, 期 1, 页码 69-73出版社
SPRINGER
DOI: 10.1007/s00239-005-0166-4
关键词
ciliate; macronucleus; micronucleus; macronuclear destined segments; internal eliminated segments; pointer; recombination
资金
- NIGMS NIH HHS [GM59708] Funding Source: Medline
Ciliates have a somatic and a germline nucleus; after sexual conjugation a new somatic nucleus forms from the new zygotic germline nucleus. Formation of the somatic nucleus involves precise elimination of a large portion of DNA sequences from the germline. Here we compare the architecture of the germline and somatic versions of the actin I gene in two geographically isolated strains of Stylonychia lemnae. We show that the structure of the germline gene is surprisingly mercurial, with the distinction between germline-limited and somatic sequences variable over the course of evolution. This is, to our knowledge, the first example of evolutionary swapping of retained versus deleted sequences during ciliate development, with sequences deleted during development that are specifically retained in another strain.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据