Presence of isochore structures in reptile genomes suggested by the relationship between GC contents of intron regions and those of coding regions
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概要
- 論文の詳細を見る
Vertebrate genomes are mosaics of isochores. On the assumption that marked differences exist in the isochore structure between warm-blooded and cold-blooded animals, variations among vertebrates were previously attributed to adaptation to homeothermy. However, based on the data of coding regions from representatives of extant vertebrates, including a turtle, a crocodile (Archosauromorpha) and a few kinds of snakes (Lepidosauromorpha), it was recently hypothesized that the common ancestors of mammals, birds and extant reptiles already had the "warm-blooded" isochore structure. To test this hypothesis, the nucleotide sequences of α-globin genes including non-coding regions (introns) from two snakes, N. kaouthia and E. climacophora, were determined (accession number: AB104824, AB104825). The correlation between the GC contents in the introns and exons of α-globin genes from snakes and those from other vertebrates supports the above hypothesis. Similar analysis using data for exons and introns of other genes obtained from the GenBank (Release 131) also support the above hypothesis.
- 2003-04-01
著者
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MIZUNO Keiko
Department of Diagnostic Pathology, Kochi Red Cross Hospital
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Ota Hidetoshi
Tropical Biosphere Research Center University Of The Ryukyus
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Mizuno Keiko
Department Of Biological And Chemical Engineering Faculty Of Engineering Gunma University
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HAMADA Kazuo
Department of Biological and Chemical Engineering, Faculty of Engineering, Gunma University
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HORIIKE Tokumasa
Department of Biological and Chemical Engineering, Faculty of Engineering, Gunma University
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SHINOZAWA Takao
Department of Biological and Chemical Engineering, Faculty of Engineering, Gunma University
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Hamada Kazuo
Radiance Ware Co.
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Shinozawa T
Department Of Integrative Bioscience And Biomedical Engineering Graduate School Of Advanced Science
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Shinozawa Takao
Department Of Biological And Chemical Engineering Faculty Of Engineering Gunma University
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Horiike Tokumasa
Department Of Integrated Genetics National Institute Of Genetics
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MIZUNO Keiko
Department of Biochemistry, Tokushima University, School of Medicine
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