title: Reaggregation of sea urchin blastula cells. I. Intrinsic differences in the blastula cells.
mesh_terms: D000818:Animals; D002118:Calcium / Q000378:metabolism; D002132:Calcium Radioisotopes; D002449:Cell Aggregation; D002469:Cell Separation; D005260:Female; D006818:Hyalin / Q000276:immunology; D007106:Immune Sera; D066298:In Vitro Techniques; D010063:Ovum / Q000166:cytology* / Q000378:metabolism; D011817:Rabbits / Q000276:immunology; D012617:Sea Urchins / Q000196:embryology*
chemical_list: D002132:Calcium Radioisotopes; D007106:Immune Sera; D002118:Calcium