Characterization of pulse-labeled nuclear RNA in sea urchin embryos.

Animals Carbon Isotopes Cell Fractionation Cell Nucleus/analysis Centrifugation, Density Gradient Cytoplasm/analysis Deoxyribonucleases Edetic Acid Embryo, Nonmammalian/analysis,cytology Microscopy, Electron Peptide Biosynthesis Phosphorus Isotopes Pronase Puromycin RNA/analysis,isolation & purification Ribonucleases Sea Urchins/cytology,embryology Surface-Active Agents Thymidine/metabolism Tritium Uridine/metabolism

Carbon Isotopes Phosphorus Isotopes Surface-Active Agents Tritium Puromycin RNA Edetic Acid Deoxyribonucleases Ribonucleases Pronase Thymidine Uridine