title: A hidden break in the 28.0S rRNA from Diphyllobothrium dendriticum.
abstract: Nondenatured and denatured total RNA from the tapeworm Diphyllobothrium dendriticum (Cestoda) was analysed by agarose gel electrophoresis. It was found that the large subunit ribosomal RNA (lrRNA) is 28.0S and the small subunit ribosomal RNA (srRNA) is 19.5S. Following denaturation the 28.0S rRNA was disrupted into a 19.5S subfragment and a 20.7S subfragment due to the presence of a centrally located hidden break. By hybridization of Northern blot membranes with oligonucleotide probes specific for the 5'- and 3'-ends of the lrRNA respectively, we have shown that the 19.5S subfragment is from the 5'-end (the alpha-subfragment) and the 20.7S subfragment from the 3'-end (the beta-subfragment) of the 28.0S rRNA of D. dendriticum.
authors.affiliation: Department of Biology, Abo Akademi University, Finland.
authors.forename: K A
authors.initials: KA
authors.lastname: Karlstedt
authors.forename: G I
authors.initials: GI
authors.lastname: Paatero
authors.forename: J H
authors.initials: JH
authors.lastname: Mäkelä
authors.forename: B J
authors.initials: BJ
authors.lastname: Wikgren
mesh_terms: D000818:Animals; D001483:Base Sequence; D015152:Blotting, Northern; D004170:Diphyllobothrium / Q000235:genetics*; D004587:Electrophoresis, Agar Gel; D008969:Molecular Sequence Data; D009693:Nucleic Acid Hybridization; D015345:Oligonucleotide Probes / Q000737:chemistry; D012339:RNA, Ribosomal, 28S / Q000737:chemistry*
chemical_list: D015345:Oligonucleotide Probes; D012339:RNA, Ribosomal, 28S