title: Maturation of reactivity to histocompatibility antigens.
mesh_terms: D000818:Animals; D006087:Graft vs Host Reaction; D006650:Histocompatibility Testing; D007519:Isoantigens; D008198:Lymph Nodes / Q000276:immunology; D008213:Lymphocyte Activation; D051379:Mice; D013154:Spleen / Q000276:immunology; D013934:Thymectomy; D013950:Thymus Gland / Q000276:immunology
chemical_list: D007519:Isoantigens