title: Change in the nature of transcription in the early embryogenesis of the sea urchin.
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D002247:Carbon Isotopes; D002474:Cell-Free System; D002843:Chromatin / Q000378:metabolism*; D004247:DNA / Q000378:metabolism; D006824:Hybridization, Genetic; D008968:Molecular Conformation; D012313:RNA / Q000096:biosynthesis* / Q000378:metabolism; D012617:Sea Urchins / Q000196:embryology*; D013698:Templates, Genetic; D014158:Transcription, Genetic; D014316:Tritium
chemical_list: D002247:Carbon Isotopes; D002843:Chromatin; D014316:Tritium; D012313:RNA; D004247:DNA