Experimental studies on the ultra-fine structure of sea urchin eggplasm by ultracentrifugation. 1. Ultra-fine structure of the mature unfertilized egg.
D000818:Animals; D004447:Echinodermata / Q000196:embryology*; D009865:Oocytes; D010063:Ovum; D012617:Sea Urchins; D014461:Ultracentrifugation
ECHINODERMATA/embryology; OVUM