title: Relation of intracellular pH and pronuclear development in the sea urchin, Arbacia punctulata. A fine structural analysis.
mesh_terms: D000818:Animals; D002467:Cell Nucleus / Q000502:physiology; D004625:Embryo, Nonmammalian / Q000502:physiology; D005260:Female; D005306:Fertilization; D006863:Hydrogen-Ion Concentration; D008297:Male; D008854:Microscopy, Electron; D008871:Microvilli / Q000502:physiology / Q000648:ultrastructure; D010063:Ovum / Q000502:physiology*; D012617:Sea Urchins / Q000254:growth & development*; D013094:Spermatozoa / Q000502:physiology; D015053:Zygote / Q000648:ultrastructure*