title: Distinction between "self" and "not-self" in lower invertebrates.
mesh_terms: D000818:Animals; D000845:Annelida / Q000276:immunology; D005075:Biological Evolution; D003063:Cnidaria / Q000276:immunology*; D003609:Dactinomycin / Q000494:pharmacology; D004058:Diffusion; D006648:Histocompatibility; D010649:Phenylalanine / Q000494:pharmacology; D011691:Puromycin / Q000494:pharmacology; D014184:Transplantation, Homologous
chemical_list: D003609:Dactinomycin; D010649:Phenylalanine; D011691:Puromycin