title: DNA synthesis by isolated embryonic nuclei of Xenopus.
mesh_terms: D000818:Animals; D001345:Autoradiography; D002467:Cell Nucleus / Q000378:metabolism*; D004625:Embryo, Nonmammalian / Q000378:metabolism; D066298:In Vitro Techniques; D008099:Liver / Q000166:cytology / Q000196:embryology; D013936:Thymidine / Q000378:metabolism; D014316:Tritium; D014981:Xenopus / Q000196:embryology* / Q000378:metabolism*
chemical_list: D014316:Tritium; D013936:Thymidine