Artículos de revistas
Localization of rDNA sites in holocentric chromosomes of three species of triatomines (Heteroptera, Triatominae).
Genetics and molecular research [electronic resource] : GMR., v. 4, n. 4, p. 704-709, 2005.
Universidade Estadual Paulista (UNESP)
Chromatin organization in the holocentric chromosomes of three triatomines species was cytologically studied by fluorescent in situ hybridization with a 45S rDNA probe of Drosophila melanogaster to localize ribosomal genes. In Triatoma tibiamaculata, metaphases I showed telomeric highlights in a single, larger bivalent. In T. protacta, hybridization was detected in one of the telomeres of an autosomal chromosome. In T. platensis, there were highlights in a single, smaller chromosome (X chromosome). The results obtained did not agree with the expected localization of rDNA genes in the sex chromosomes of triatomines, as demonstrated by silver impregnation, and suggest that the chromosome reorganization that occurred in this group during evolution may be a more important mechanism involved in rDNA distribution.
Showing items related by title, author, creator and subject.
Gobbo César, Ana Cristina; de Freitas Calmon, Marília; Cury, Patrícia Maluf; Caetano, Alaor; Borim, Aldenis Albaneze; Silva, Ana Elizabete
Universidade Estadual Paulista (UNESP); UNIP - Araçatuba; Faculdades Católicas Salesianas; School of Medicine (2006-01-28)Aim: To investigate the occurrence of chromosome 3, 7, 8, 9, and 17 aneuploidies, TP53 gene deletion and p53 protein expression in chronic gastritis, atrophic gastritis and gastric ulcer, and their association with H pylori ...
Localization of rDNA sites in holocentric chromosomes of three species of triatomines (Heteroptera, Triatominae). Severi-Aguiar, Grasiela Dias de Campos; Oliveira, Maria Tercília Vilela de Azeredo