title: Molecular characterization of the 5S ribosomal gene of the Bradysia hygida (Diptera:Sciaridae).
abstract: The rRNA genes are amongst the most extensively studied eukaryotic genes. They contain both highly conserved and rapidly evolving regions. The aim of this work was to clone and to sequence the Bradysia hygida 5S rDNA gene. A positive clone was sequenced and its 346 bp sequence was analyzed against the GenBank database. Sequence analysis revealed that the B. hygida 5S (Bh5S) rDNA gene is 120 bp long and is 87% identical to the aphid Acyrthosiphon magnoliae 5S rDNA gene. The Bh5S rDNA gene presents two unusual features: a GG pair at the 5' end of the gene sequence and the localization of the polyT signal immediately after the 3' end of the gene. In situ hybridization experiments revealed that the Bh5S rDNA gene is localized in the autosomal A chromosome.
authors.affiliation: Departamento de Biologia Celular e Genética, Universidade Estadual de Maringá, 87020-900 Maringá, Paraná, Brasil.
authors.forename: Lucinéia de Fátima Chasko
authors.initials: Lde F
authors.lastname: Ribeiro
authors.forename: Maria Aparecida
authors.initials: MA
authors.lastname: Fernandez
mesh_terms: D000818:Animals; D001483:Base Sequence; D004175:Diptera / Q000235:genetics*; D004331:Drosophila melanogaster / Q000235:genetics; D005260:Female; D017403:In Situ Hybridization; D007814:Larva / Q000235:genetics; D008969:Molecular Sequence Data; D012341:RNA, Ribosomal, 5S; D017422:Sequence Analysis, DNA
chemical_list: D012341:RNA, Ribosomal, 5S