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	Provedor de dados Biol. Res. (2) Autor Valenzuela,Carlos Y (2) Palavra-chave DNA periodicity (2) Dinucleotide analysis (1) Dinucleotides (1) Neutral evolution (1) Nucleotide heterogeneity (1) Panselective evolution (1) Periodicity structure (1) Selective interactions (1) Theories of evolution (1) Mais... Tipo do documento Journal article (2) Ano 2014 (1) 2010 (1) País Chile (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Internucleotide correlations and nucleotide periodicity in Drosophila mtDNA: New evidence for panselective evolution Biol. Res. Valenzuela,Carlos Y. Analysis for the homogeneity of the distribution of the second base of dinucleotides in relation to the first, whose bases are separated by 0, 1, 2,... 21 nucleotide sites, was performed with the VIH-1 genome (cDNA), the Drosophila mtDNA, the Drosophila Torso gene and the human p-globin gene. These four DNA segments showed highly significant heterogeneities of base distributions that cannot be accounted for by neutral or nearly neutral evolution or by the "neighbor influence" of nucleotides on mutation rates. High correlations are found in the bases of dinucleotides separated by 0, 1 and more number of sites. A periodicity of three consecutive significance values (measured by the x²9) was found only in Drosophila mtDNA. This periodicity may be due to an... Tipo: Journal article Palavras-chave: Nucleotide heterogeneity; DNA periodicity; Dinucleotide analysis; Neutral evolution; Panselective evolution. Ano: 2010 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602010000400014 The structure of selective dinucleotide interactions and periodicities in D melanogaster mtDNA Biol. Res. Valenzuela,Carlos Y. BACKGROUND: We found a strong selective 3-sites periodicity of deviations from randomness of the dinucleotide (DN) distribution, where both bases of DN were separated by 1, 2, K sites in prokaryotes and mtDNA. Three main aspects are studied. I) the specific 3 K-sites periodic structure of the 16 DN. II) to discard the possibility that the periodicity was produced by the highly nonrandom interactive association of contiguous bases, by studying the interaction of non-contiguous bases, the first one chosen each I sites and the second chosen J sites downstream. III) the difference between this selective periodicity of association (distance to randomness) of the four bases with the described fixed periodicities of base sequences. RESULTS: I) The 16 pairs... Tipo: Journal article Palavras-chave: Dinucleotides; DNA periodicity; Periodicity structure; Selective interactions; Theories of evolution. Ano: 2014 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602014000100018 Registros recuperados: 2 Primeira ... 1 ... Última

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