title: Induction of amphibian oocyte maturation by polyvalent cations and alkaline pH in the absence of potassium ions.
mesh_terms: D000818:Animals; D002118:Calcium / Q000494:pharmacology; D003470:Culture Media; D005260:Female; D006863:Hydrogen-Ion Concentration; D007811:Lanthanum / Q000494:pharmacology; D008274:Magnesium / Q000494:pharmacology; D009866:Oogenesis / Q000187:drug effects*; D011188:Potassium / Q000502:physiology*; D011374:Progesterone / Q000494:pharmacology*; D014981:Xenopus / Q000502:physiology*
chemical_list: D003470:Culture Media; D011374:Progesterone; D007811:Lanthanum; D008274:Magnesium; D011188:Potassium; D002118:Calcium