title: The onset of DNA synthesis and its relation to morphogenetic events of the pronuclei in activated eggs of the sea urchin, Arbacia punctulata.
mesh_terms: D000818:Animals; D001345:Autoradiography; D001973:Bromodeoxyuridine / Q000378:metabolism; D002459:Cell Fusion; D002467:Cell Nucleus / Q000502:physiology*; D004247:DNA / Q000096:biosynthesis*; D005260:Female; D005306:Fertilization; D008540:Meiosis; D008854:Microscopy, Electron; D009024:Morphogenesis; D010063:Ovum / Q000378:metabolism*; D012617:Sea Urchins / Q000196:embryology*; D013936:Thymidine / Q000378:metabolism; D014316:Tritium
chemical_list: D014316:Tritium; D004247:DNA; D001973:Bromodeoxyuridine; D013936:Thymidine