title: Sodium-dependent and sodium-independent phosphate uptake by full-grown, prophase-arrested oocytes of Xenopus laevis before and after progesterone-induced maturation.
abstract: The uptake of inorganic phosphate by full-grown, prophase-arrested oocytes occurs by two essentially independent transport systems, which accomplish the delivery of extracellular phosphate into two different cellular compartments. One transport system is sodium-dependent, the other is sodium-independent. Both systems can be inhibited by sulfhydryl reagents and the sodium-dependent system becomes inhibited during progesterone-induced oocyte maturation.
mesh_terms: D002731:4-Chloromercuribenzenesulfonate / Q000494:pharmacology; D000818:Animals; D001692:Biological Transport; D005033:Ethylmaleimide / Q000494:pharmacology; D007700:Kinetics; D008540:Meiosis; D009865:Oocytes / Q000378:metabolism*; D010710:Phosphates / Q000378:metabolism*; D011374:Progesterone / Q000494:pharmacology; D011418:Prophase; D012964:Sodium / Q000502:physiology*; D014982:Xenopus laevis
chemical_list: D010710:Phosphates; D011374:Progesterone; D002731:4-Chloromercuribenzenesulfonate; D012964:Sodium; D005033:Ethylmaleimide