title: Early cyclical changes in polyamine synthesis during sea-urchin development.
mesh_terms: D000818:Animals; D002247:Carbon Isotopes; D002262:Carboxy-Lyases / Q000032:analysis; D002455:Cell Division; D002848:Chromatography, DEAE-Cellulose; D004625:Embryo, Nonmammalian / Q000378:metabolism*; D005306:Fertilization; D011700:Putrescine / Q000096:biosynthesis*; D012617:Sea Urchins / Q000201:enzymology / Q000254:growth & development / Q000378:metabolism*; D013095:Spermidine / Q000096:biosynthesis*; D013096:Spermine / Q000096:biosynthesis*; D013997:Time Factors
chemical_list: D002247:Carbon Isotopes; D013096:Spermine; D002262:Carboxy-Lyases; D013095:Spermidine; D011700:Putrescine