title: Spermine is major polyamine in sea urchins: studies of polyamines and their synthesis in developing sea urchins.
mesh_terms: D000818:Animals; D002247:Carbon Isotopes; D002262:Carboxy-Lyases / Q000032:analysis; D002854:Chromatography, Paper; D004586:Electrophoresis; D008715:Methionine; D009952:Ornithine; D011700:Putrescine / Q000032:analysis / Q000096:biosynthesis; D012617:Sea Urchins / Q000032:analysis / Q000196:embryology / Q000201:enzymology / Q000378:metabolism*; D013095:Spermidine / Q000032:analysis / Q000096:biosynthesis; D013096:Spermine / Q000032:analysis / Q000096:biosynthesis*
chemical_list: D002247:Carbon Isotopes; D013096:Spermine; D008715:Methionine; D009952:Ornithine; D002262:Carboxy-Lyases; D013095:Spermidine; D011700:Putrescine