Electronic Resource
Springer
Journal of molecular evolution
7 (1975), S. 75-86
ISSN:
1432-1432
Keywords:
5sRNA Evolution
;
Rate of 5sRNA Evolution
;
Phylogenic Tree
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Summary The evolution of 5sRNA of 17 organisms ranging from human to bacteria has been studied using a sequence homology analysis. The evolutionary rate of 5sRNA genes has been estimated to be 2.2×10−10 replacement per one nucleotide site per year. This value is about the same as that of cytochrome C or tRNA's (≃ 2×10−10). A phylogenic tree of these organisms including both eukaryotes and prokaryotes has been constructed from the evolutionary distances (the rate of nucleotide substitution per site) data. The time of divergence of prokaryotes and eukaryotes was estimated to be ≳ 1.75×109 years ago and the branching order in eukaryotic kingdoms is consistent with the traditional order. Blue-green algae separated from the bacterial stem ≳ 1.3×109 years ago after eukaryotes had branched.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01732181
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