title: In vitro RNA synthesis and nuclear proteins of isolated sea urchin embryo nucleo.
mesh_terms: D000818:Animals; D002247:Carbon Isotopes; D002467:Cell Nucleus / Q000187:drug effects / Q000378:metabolism*; D002875:Chromosomes / Q000378:metabolism*; D004247:DNA; D003609:Dactinomycin / Q000494:pharmacology
chemical_list: D002247:Carbon Isotopes; D003609:Dactinomycin; D004247:DNA