Structural analysis of nucleolar precursors of ribosomal ribonucleic acid. Polypurine sequences in nucleolar 28 S ribonucleic acid of Novikoff hepatoma ascites cells.

Animals Ascitic Fluid/pathology Autoradiography Base Sequence Carcinoma, Hepatocellular/metabolism Cell Nucleolus/metabolism Centrifugation, Density Gradient Chromatography, DEAE-Cellulose Chromatography, Ion Exchange Cytosine Nucleotides/analysis Electrophoresis Hydrogen-Ion Concentration Liver Neoplasms Male Neoplasms, Experimental/metabolism Pancreas/enzymology Paper Phosphates Phosphoric Monoester Hydrolases Phosphorus Isotopes Polynucleotides/analysis RNA, Neoplasm/analysis RNA, Ribosomal/biosynthesis Rats Ribonucleases Spleen/enzymology Uracil Nucleotides/analysis

Cytosine Nucleotides Phosphates Phosphorus Isotopes Polynucleotides RNA, Neoplasm RNA, Ribosomal Uracil Nucleotides Ribonucleases Phosphoric Monoester Hydrolases