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Comparison between phylogeny of introns and exons in primates 被引量:2

Comparison between phylogeny of introns and exons in primates
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摘要 Introns and exons of 7 genes ( epsilon globin, gamma-1 globin, gamma-2 globin, delta globin, beta globin, Immunoglobulin and prepro-insulin) in primates have been separated out and used to infer phylogeny respectively. For each gene, results based on these two parts have been compared and showed that: ( i ) the topology of introns is almost Introns and exons of 7 genes ( epsilon globin, gamma-1 globin, gamma-2 globin, delta globin, beta globin, Immunoglobulin and prepro-insulin) in primates have been separated out and used to infer phylogeny respectively. For each gene, results based on these two parts have been compared and showed that: ( i) the topology of introns is almost consistent with that of exons in each gene, while the branch length of them varies, because of the different mutation rate; ( ii) there is evidence that the substitution rate of exons would decrease in hominoids, but that of introns would not; (iii) divergence time of orangutan deduced from different genes based on exons is various, while that based on introns is much similar, and consistent with fossil records; (iv) there is a relationship between the G + C content and the substitution rate. When the substitution rate of introns is higher than exons in a gene, the G + C content of introns is less. The above results suggest that introns could provide useful evolutionary information among closely related species.
作者 Wang, N Chen, RS
机构地区 Chinese Acad Sci
出处 《Chinese Science Bulletin》 SCIE EI CAS 1999年第21期1940-1946,共7页
关键词 PHYLOGENY inference INTRON SUBSTITUTION rate molecular evolution. phylogeny inference intron substitution rate molecular evolution
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同被引文献31

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