title: Size and secondary structure of avian myeloblastosis virus associated ribosomal RNA: comparison with cellular and precursor ribosomal RNA.
abstract: Ribosomal RNA isolated from ribosomes present inside avian myeloblastosis virus (AMV) was characterized by electron microscopy using the formamide-urea spreading technique. The molecular weight and the secondary structures were compared with those of r-RNA and precursor r-NA isolated from host cells, the leukemic myeloblasts. The molecular weight of viral r-RNA (1.62 +/- 0.18 X 10(6) and 0.69 +/- 0.10 X 10(6)) and the molecular weight of cellular r-RNA (1.63 +/- 0.18 X 10(6) and 0.67 +/- 0.09 X 10(6)), the latter obtained from avian myeloblasts, were found to be identical and comparable with the molecular weight of chicken liver r-RNA. Likewise, the secondary structures of viral r-RNA were identical to those of cellular r-RNA. The postulated possible precursor character of viral r-RNA was excluded, since the molecules of viral r-RNA do not show any similarity to those of precursor r-RNA. Previously observed differences in behavior of viral and cellular (myeloblastic) r-RNA in sedimentation and electrophoretic mobility are discussed.
mesh_terms: D000818:Animals; D001353:Avian Leukosis / Q000032:analysis* / Q000648:ultrastructure; D001354:Avian Leukosis Virus / Q000032:analysis*; D009189:Avian Myeloblastosis Virus / Q000032:analysis* / Q000648:ultrastructure; D008854:Microscopy, Electron; D008970:Molecular Weight; D009690:Nucleic Acid Conformation; D009694:Nucleic Acid Precursors / Q000032:analysis; D012335:RNA, Ribosomal / Q000032:analysis*; D012367:RNA, Viral / Q000032:analysis*; D012270:Ribosomes / Q000648:ultrastructure
chemical_list: D009694:Nucleic Acid Precursors; D012335:RNA, Ribosomal; D012367:RNA, Viral