title: Absence of a Ca response following ammonia activation of sea urchin eggs.
mesh_terms: D000643:Ammonium Chloride / Q000494:pharmacology*; D000818:Animals; D002118:Calcium / Q000378:metabolism*; D005260:Female; D005306:Fertilization; D010063:Ovum / Q000187:drug effects / Q000378:metabolism*; D012617:Sea Urchins
chemical_list: D000643:Ammonium Chloride; D002118:Calcium