title: Sea urchin embryos do not synthesize diadenosinetetraphosphate.
mesh_terms: D000225:Adenine / Q000378:metabolism; D000227:Adenine Nucleotides / Q000096:biosynthesis*; D000818:Animals; D002455:Cell Division; D004247:DNA / Q000096:biosynthesis; D004625:Embryo, Nonmammalian / Q000378:metabolism*; D005260:Female; D014176:Protein Biosynthesis; D012335:RNA, Ribosomal / Q000096:biosynthesis; D012617:Sea Urchins / Q000196:embryology*
chemical_list: D000227:Adenine Nucleotides; D012335:RNA, Ribosomal; D004247:DNA; D000225:Adenine