title: Some immunochemical characteristics of sea urchin gametes.
mesh_terms: D000818:Animals; D000941:Antigens / Q000032:analysis*; D004447:Echinodermata; D005260:Female; D005306:Fertilization; D005854:Germ Cells / Q000276:immunology*; D005779:Immunodiffusion; D008297:Male; D010063:Ovum / Q000276:immunology; D012737:Sex Factors; D013045:Species Specificity; D013094:Spermatozoa / Q000276:immunology
chemical_list: D000941:Antigens