Further evidence on the nuclear origin and transfer to the cytoplasm of polyadenylic acid sequences in mammalian cell RNA.

Adenine Nucleotides/metabolism Cell Fractionation Cell Nucleus/metabolism Centrifugation, Density Gradient Centrifugation, Zonal Chromatography, Affinity Dactinomycin/pharmacology Deoxyadenosines/pharmacology Electrophoresis, Polyacrylamide Gel HeLa Cells/cytology,drug effects,metabolism Humans Isotope Labeling Molecular Weight Phosphorus Isotopes Polynucleotides/analysis,biosynthesis RNA/biosynthesis,isolation & purification Ribosomes/metabolism Time Factors Transcription, Genetic Tritium Ultrafiltration

Adenine Nucleotides Deoxyadenosines Phosphorus Isotopes Polynucleotides Tritium Dactinomycin RNA