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CCR5D32 mutation in three Brazilian populations of predominantly Sub-Saharan African ancestry Genet. Mol. Biol.
Carvalho,Mônica W.P.; Leboute,Ana P.M.; Oliveira,Silviene F.; Sousa,Sandra M.B.; Klautau-Guimarães,Maria de Nazaré; Simões,Aguinaldo L..
This study reports the frequencies of the CCR5D32 mutation of the beta-chemokine 5 gene and discusses the possible effects of past and recent gene flow in three quilombo remnants (Brazilians communities with anthropological African ancestry whose ancestors were escaped slaves): Rio das Rãs, Mocambo, and São Gonçalo in the northeastern region of Brazil. The CCR5D32 allele frequency of the Mocambo population was significantly higher (5.6%) than that found in the Rio das Rãs (1%) and São Gonçalo (0.9%) populations. These differences may reflect different proportions of parental populations in the founders individuals, a founder-effect and/or different histories of inter-ethnic contact. The frequency of the CCR5D32 allele in the Mocambo sample is similar to...
Tipo: Info:eu-repo/semantics/article Palavras-chave: CCR5; Genetic polymorphism; Sub-Saharan Afro-derived Brazilian populations; Ethnic-grouspecific marker.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572004000300002
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Haptoglobin gene subtypes in three Brazilian population groups of different ethnicities Genet. Mol. Biol.
Miranda-Vilela,Ana L.; Akimoto,Arthur K.; Alves,Penha C.Z.; Hiragi,Cássia O.; Penalva,Guilherme C.; Oliveira,Silviene F.; Grisolia,Cesar K.; Klautau-Guimarães,Maria N..
Haptoglobin is a plasma hemoglobin-binding protein that limits iron loss during normal erythrocyte turnover and hemolysis, thereby preventing oxidative damage mediated by iron excess in the circulation. Haptoglobin polymorphism in humans, characterized by the Hp*1 and Hp*2 alleles, results in distinct phenotypes known as Hp1-1, Hp2-1 and Hp2-2, whose frequencies vary according to the ethnic origin of the population. The Hp*1 allele has two subtypes, Hp*1F and Hp*1S, that also vary in their frequencies among populations worldwide. In this work, we examined the distribution frequencies of haptoglobin subtypes in three Brazilian population groups of different ethnicities. The haptoglobin genotypes of Kayabi Amerindians (n = 56), Kalunga Afro-descendants (n =...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Brazilian ethnicities; Haptoglobin; Polymorphism; Subtypes.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572009000300005
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Impact of a chromosome X STR Decaplex in deficiency paternity cases Genet. Mol. Biol.
Trindade-Filho,Aluisio; Ferreira,Samuel; Oliveira,Silviene F..
Deficiency paternity cases, characterized by the absence of the alleged father, are a challenge for forensic genetics. Here we present four cases with a female child and a deceased alleged father in which the analysis of a set of 21 or 22 autosomal STRs (AS STRs) produced results within a range of doubt when genotyping relatives of the alleged father. Aiming to increase the Paternity Index (PI) and obtain more reliable results, a set of 10 X-linked STR markers, developed by the Spanish and Portuguese Group of the International Society for Forensic Genetics (ISFG), was then added. Statistical analysis substantially shifted the results towards the alleged fatherhood in all four cases, with more dramatic changes when the supposed half-sister and respective...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Forensic genetics; ChrX STR Decaplex; X-linked markers; Deficiency paternity case; Paternity Index.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572013000400008
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