Uptake and release of calcium by isolated egg cortices of the sea urchin Paracentrotus lividus.
Isolated cortices from sea urchin eggs accumulate calcium in a non-mitochondrial store at a rate dependent on ATP and enhanced by oxalate. Calcium efflux is increased by ionomycin and by A23187 which has been used as a parthenogenetic agent, but not by weak base (NH4Cl). Accumulated calcium is partially released by 1,4,5 inositol triphosphate.
D000643:Ammonium Chloride / Q000494:pharmacology; D000818:Animals; D000001:Calcimycin / Q000494:pharmacology; D002118:Calcium / Q000378:metabolism*; D004987:Ethers / Q000494:pharmacology; D005260:Female; D015759:Ionomycin; D007700:Kinetics; D010063:Ovum / Q000187:drug effects / Q000378:metabolism*; D012617:Sea Urchins
D004987:Ethers; D000643:Ammonium Chloride; D000001:Calcimycin; D015759:Ionomycin; D002118:Calcium